Nokia 7510s Microphone Failure solution on

Here's brief solution for a hardware relalated microphone failure on Nokia 7510s. this solution simply shows the location of microphone components location on the PCB board that might get damaged if the microphone failed to have an audio sound output during transmission.

Nokia 7510s mic problem solutions

The 7510 supernova used a digital microphone components mounted located at the bottom side of the PCB, It composed of 5 terminal which is for the connection of the supply voltage, data signal output, clock signal and groundings. The picture above shows each of the corresponding terminal connection which feeds from or to a chip resistors. This resistors has a resistance value of 100 ohms each.

Hints for repair: check the supply vdd supply voltage, this voltage came from a VSIM second voltage; Look for the vsim voltage location capacitor on the vsim circuit, the other side of that capacitor is where the supply voltage for the microphone came from. Check all the resistors resistance value, replace it if the desired reading of approximately 100 ohms meet. Replace a new microphone if all of the above mention is working  fine.

Nokia 7510s supernova insert sim card problem solution

5A solution for Nokia 7210s insert sim card problem. This problem causes when the device is having a hardware damaged failure on the sim card connection circuit.

Nokia 7510s Insert Sim card solution ( sim card ways)

The solution guide above shows the connection of the Sim card pin connector from the sim card holder socket to the internal solder ball bumps of an IC component which is the power IC. There are 5 connections that needs the sim card to work when inserted, these are the Vsim which the supply voltage of the sim card, the ground connection, the data signal, clock and reset. If one these five connections failed to connect to the sim card module this will result on displaying insert sim card on the LCD screen.

repair tip: ensure that the sim card connector pins are well cleaned and free from corrosion a oxidation, these oftentimes also causes the problem. check the vsim and the reset line paths continuity through to chip capacitors that where it is being connected, check also the grounding pin's continuity to ground lines of the PCB board. Those are the very basic steps to check an insert sim card problem and beyond that it needs to work on the IC component (power IC) on which the line paths where connected internally of the IC component's solder ball bumps.

Nokia C3 Qwerty Keypads Ways and Solution

This solution may help to trace and repair a particular QWERTY keys that  doesn't work or stop responding when press. This guide shows  the layout of the nokia C3 of each corresponding QWERTY keys line paths and connection. Before proceeding to trace of each particular line paths please ensure that the keypad membrane switches is perfectly clean and free from any corrosion and oxidation,  the membrane switches will not having a good contact to the keypads cores if it is corroded. All corresponding
membrane switch keypad must be absolutely clean. You may need a new replacement keypad membrane on it if the membrane switches is damaged and unable to pop up back when press.



Each corresponding keys are divided into group of rows and columns. The outer core layer of the keypad are group into rows and the inner core layer are group into columns. Each rows and columns are connected with each other.

The Nokia C3 silicone rubber keypads

The outer core are group  from 0 to 7 rows. Each color on the picture indicate where that certain keys are connected to a group of rows.

The Outer core connection line paths ( C3 keypad ways )

The inner core layer are group from 0 to 7 columns. Each color on the picture indicate where that certain keys are connected to a group of columns.

The Inner core connection line paths ( C3 keypad ways )

The keypad line paths is connected into an EMI-ESD filter chip which is located at the right side of the main PCB board. This chip  also get damaged and result to keypad malfunction. The picture below shows also the internal connection of the EMI filter chips from each keypads rows and columns.

Hardware Repair Tips for keypads: If just only one or two to four  keys are not working the problem may lies an open or cut connection to it, trace where that certain keys does not work to the particular group of rows or columns it is being connected. You may apply a simple jumper wire on it as an alternative way. If more than five or more keys are not working you may consider that the problem lies on a damaged EMI-ESD filter chip

Nokia 7510s Earpiece speaker solution - PCB board component repair

If you are trying to repair the earpiece speaker failure on Nokia 7510 supernova and found out that the earpiece speaker is working fine and think that the problem  lies on the flex cable wire.
This solution is the second step  repair procedure before trying to replace the flex cable wire on it and 
might help to solve also.

 Nokia 7210s Earpiece Speaker PCB component 

and line paths (earpiece speaker ways)

 Just figure out the picture above for it shows the location of particular components such as the chip filter coils and chip resistors that is connected to the earpiece speaker before it goes through the flex cable wire.
If these components is damaged, no matter how many times yo replace the flex cable wire will not solved the earpiece speaker failure  issues. The chip resistor is has a value of zero ohms it means that the said resistor is fusible. You may check the continuity of both chip resistor and filter coil first before trying to install a new replacement flex cable wire on the device.

Nokia 7510s Intgrated Hands Free mode loud speaker solution

This repair solution covered for Nokia 7510 supernova Hands Free Speaker Failure. The speaker failed to have no audio sound output when trying to activate the hands free mode our loud speaker option. This solution simply shows and tell us the location of the spare components that might cause the speaker failure.
Ensure that the Speaker is perfectly working before  trying to use this solution. This solution may only help if the said speaker is working fine.

Nokia 7510s Hands Free Mode / Ringer loud Speaker solution

The solution only shows the possible components that might cause the problem if the loud speaker does not have and audio sound output. The components on the layout is composed of the filter coils and a protection filter  that looks like a chip resistor. You may check those certain components by checking the chip filter coils continuity using a multimeter. Those two black colored components are ESD protection resistor, you may check it also if shorted or not, replace it if found shorted, removing it and leave it open, also works but not advisable.

Nokia 7510s Unable to charge repair solution

Here's the solution tp repair Nokia 7510 supernova Charging problem issues. This solution shows the location of the spare components that might get damaged if the device does not respond when a charger is plug-in.

Nokia 7510s Not Charging Solution

From the charging pin terminal the charger positive voltage is feeds across to a chip fuse, if the chip fuse is damaged or busted the battery charger voltage can't get through to the circuit,
make a continuity check on the fuse by using a multimeter, replace it if found damaged.
Check the chip diode if shorted or not, a shorted diode will make the fuse blown out again.
If the chip fuse and chip fuse is working fine and found out that there's no problem on both  it, you may proceed to work on the betty IC,
The betty IC holds and control the charging operation of the cell phone battery.
Re-flow and apply a mild heat first on the betty IC, then check again if the problem was solved.
If the problem still exists, remove the betty IC, trace the corresponding solder ball bumps that is connected to the filter coil (power inductor). If found cut or open and you can manage to apply a jumper wire, then do it, if won't not just leave it and return it to the owner..
If the said line paths is okay you may re-ball the betty IC then in-place and mount it back again.
If the problem still persists, you may then find a new replacement spare betty IC and replace it.

Nokia 7210 Supernova Insert Sim Card Problem solution

Here's a solution to repair hardware related issues for Nokia 7210 supernova Insert sim card problem. This solution shows the location of the particular components such as chip resistors and chip coil that might get damaged if the said problem occurred.

Nokia 7210s Insert Sim card Solution

Hints for repair: check the sim socket pin connector if free from corrosion and oxidations. Check the Vsim power supply voltage line paths from the Vsim chip capacitor located near the power supply IC. check and replace the corresponding connected resistors which has a value of 33 ohms.

Nokia 5800 xpressmusic Solution to fix Side key switches and button on

Here's the solution to repair the Camera switch, Camera focus, slider lock, volume up and volume down key switches on Nokia 5800 Xpressmusic when  damaged and failed to respond when press.
This solution shows the location of the particular ic component that might get damaged when  all of the above side key switches will unable to function.

Nokia 5800 Xpressmusic camera switch, slider lock, 

volume up and volume down control Side key repair Solution

The slider lock switch, volume down control button switch and the camera button switch is connected with an ESD-EMI filter chip ( crystal glass IC ) marked number 1 on the picture above before it feeds to the I/O expander chip which is marked in number 2. The volume up control switch is connected directly to input and output expander chip, so there's no need to touch the ESD-EMI filter chip if only the volume up control button is not working. If all of the four side keys is not working you can then both work on the I/O expander chip. The SEND/CALL, END/CANCEL and application launcher keys were also connected on the ESD-EMI filter chip and so on the I/O expander chip. You may then check and replace both of the said IC chip if all the keys is not working or not responding.

Nokia 5800 xpressmusic damaged Power ON-OFF switch jumper ways Solution

This solution shows the exact location where to apply a jumper wire as an alternative way to repair a damage ON and OFF power switch key line paths on Nokia 5800. This solution will help to fix the phone that unable to power up because of a damaged and cut power way tracks.

Nokia 5800 ON/OFF power switch alternative jumper solution guide

The jumper spot is located near the flash cable pin out of Nokia 5800 xpressmusic rear PCB board. You can apply a tiny jumper wire on that location through to the bottom terminal of the ON/OFF power switch key.

Nokia 1800 and Nokia 1616 Solution to fix Charger Not Supported on

Charger not supported occurs if the battery temperature resistor is being damaged, This solution shows the exact location of this said chip resistor on the main PCB board. This chip resistor needs to replace if a charger not supported will show on the LCD display screen during when a battery charger is being plug-in.

Nokia 1800 and nokia 1616 charger not supported solution

The value of this said chip resistor is 47K, you may find a replacement on it any non working old nokia PCB board.

Nokia 1616 and Nokia 1800 solution No Signal problem

Here's the solution that shows the particular components that might get damaged when the Nokia 1616 and nokia 1800 having a signal problem issues. This repair solution guide shows the layout of a components and particular test spots to check during servicing NO network signal problem.

Nokia 1800 and Nokia 1616 No network signal Solution

The RF circuit is located at the bottom of the pcb board. The RF clock oscillator and the RF power amplifier chip is a good spots where to begin  checking up. Before trying to remove and replace this ic component, you may check the corresponding Vbat voltage first on the chip capacitors indicated on the picture. This Vbat voltage is a power supply voltage that came from the battery positive terminal. The TX chip resistor that have  resistance value of ohms is where a part of TX signal flows across to it from the RF clock oscillator, you may check it also.

Nokia 1800 and Nokia 1616 Power ON-OFF switch Key Line paths solution

Here's the solution to repair Nokia 1616 and Nokia 1800 power ON/OFF switch problem.
This problem may cause the device unable to power up when hitting the power key. The problem may easily configured if the power ON and OFF switch key has no response, but the device is not totally dead for it shows a charging indication when you charge it up. Now, this solution simply shows the line paths (ON OFF ways)of the power key.

Nokia 1616, 1800 Power ON OFF switch Line Paths (ON and OFF ways)

Hints for repair: when the device will unable to power up when hitting the power key button but it shows charging indication when you plug-in the battery charger, the problem may possibly lies on the power key line paths. But before tracing the line paths, you must see to it that the keypad membrane is perfectly clean and free from dirt, corrosion and oxidation. You can check the power ON/OFF voltage to the inner core of the switch key terminal pads, this voltage may range approximately  from 1to 3 volts. If there is no voltage reading you get on that spot, locate and trace the  test spots for the power switch, see the picture guide above, it is located just near the keypad LED. Make a continuity check by using a multimeter to those corresponding spots indicated on the picture guide, from the power key pads through to each corresponding component. The outer core is connected to a chip capacitor located near the clock crystal oscillator.

Nokia 2710 Navigation Edition Hands Free Speaker problem solutions

Here's the solution may help to fix Nokia 2710Ne IHF- Integrated Hands free Speaker Problem.
This solution shows the location of certain components that might get damaged when the IHF loud speaker that does not have an audio sound output when the hands free loud speaker is activated.

Nokia 2710NE Hands Free Speaker Components layout and tracing line paths.

Repair hints: 
Make sure to have completely check the speaker and found it working okay before proceeding.
Check the speaker terminals and terminal pads that it have a strong contact connection. A corroded and speaker terminal and terminal pads make also the circuit to fail.
Check both the positive and negative filter coil, these are chip inductors that filter the audio signals from the audio amplifier IC. Then check and also the corresponding  input chip resistors just located near the audio amplifier chip, these resistors have resistance value of zero ohms. Do a mild re-flow on the audio amplifier chip. Remove and do have a line check to its solder ball bumps to the corresponding components where it is being connected. Try to replace a new replacement audio amplifier IC if all the corresponding components and line paths seems to be okay.

Nokia X6 not charging problem issues solution

This solution will show you and guide to fix  Nokia X6 charging problem issues like Not charging, charger no response when plug-in. This common problem occurs when the said handset is damaged by a liquid or water damaged, excessive charger voltage is being feed to the device or by using a non compatible battery charger to it.

Nokia x6 charging protection circuit components layout ( charging ways)

This guide only shows the particular components such as the chip or smd fuse, filter coil (power inductor) the chip diode and chip capacitors which possibly might get damaged and causes the handset device unable to charge up the battery.

Tips for repair: check the chip fuse and filter coil continuity if found open replace it, check also the chip diode if shorted, a shorted chip diode will make the chip fuse blown again. Don't ever jumper the fuse, the device circuit will need protection when excessive voltage from the battery charger happen.

Nokia 2710 ne Mic, mouthpiece, microphone problem solution

Here's the solution for Nokia 2710 navigation edition when trying  to fix a microphone problem issues.  It's a failure on the hardware which there is no audio sound can be heard over the receiver's earpiece speaker. 
This solution simply shows the location of the components where you may  to have a check or replace if found damaged.  In Nokia 2710ne, the cell phone microphone is installed or mounted on the bottom side of the PCB board, and also all of its corresponding circuit components  such as the filter coils or surface mount inductors, chip resistors and chip capacitor were also mounted near to it.

Nokia 2710NE Mouthpiece microphone circuit components and test spots

This also includes the circuit connection line paths (mic ways) for easy tracing procedures. The three lines paths corresponds to the polarity of the audio signals, the red line is for the positive, the blue line  is for negative and the bright green lines correspond as the positive voltage bias of the microphone. If this voltage bias when cut or damaged it will also result to a poor audio signal level or no microphone audio signal.

Nokia 5000 Local Mode, Test Mode Solution

Here's the local mode and test mode activated problem on Nokia 5000.
This solution show the chip resistor that is connected to the cell phone battery terminal BSI line this resistor might get damaged and needs to replace when a local mode or test mode shows when the powering up the said nokia 5000.

Nokia 5000 local mode test mode solution

Some test mode and local mode problem due to a weak cell phone battery itself and also the battery terminal BSI lines being corroded, so make sure to consider those area is properly check and being tested.

Nokia 5000 No Network Signal Problem Solution

Here's a solution to fix Nokia 5000 Signal problem related issues like no signal being intercepts, show a dropping signal on the display. This solution simply shows the location of the components and tests spots to check with when trying to fix nokia 5000 signal loss.

The solution picture guide indicated with numbers are the test spots and components might possibly get damaged if the signal loss occurs. In most  cases the RF signal is loss or become weak if the RF IC and the RF power amplifier IC (PA IC) possibly damaged. You can check the corresponding power supply voltage first before attempting to rework or replace it with a new replacement spare component parts.

Nokia E72 Not Charging Problem Repair Solution Guide

Here's the solution to repair Nokia E72 charging problem issues, this repair solution guide shows the exact location of particular components that might get damaged when a charging problem occurs like not charging, a good and working battery charger shows no response or indication when plug-in.

This solution also shows the line paths for easy line tracing repair procedure.

The Nokia E72 Charging Circuit components location and line paths

 Charging ways, charging components connections 

Repair tips:

1. check the charging pin connector, free from dirt or corrosion, if the pin is damaged find a new replacement charging pin.
Make sure that charging pin contact pads is also clean.

2. Check the fuse continuity by using a multimeter, if found open or damaged replace it. check the diode if shorted, shorted diode will make the fuse blown again, replace if found shorted.

3. check also the filter coil. Sometimes the filter coil might also get damaged if an extreme short circuit occurs like water damaged device.

4. check all the corresponding charging line paths from the charging pin terminal pads across to each corresponding components connections. Apply a tiny jumper wire on it if found cut or open.

Nokia 1616 and Nokia 1800 repair solution Microphone problem solution

Here's a simple solution that can be used to repair a damaged Nokia 1800 and Nokia 1616 Mouthpiece microphone problem, In this repair guide it shows the location of  particular components that might possibly damaged when the problem occurs. Tis solution can be used after in-placing or installing a new microphone module on the device but the problem still exists and does not solve the problem.

Mouthpiece microphone components layout and tracing line paths for nokia 1800 and nokia 1616

Repair tips:
1. Check or replace a new microphone replacement before proceeding..
2. make sure that microphone's contact pads is absolutely clean, a poor contact pads of the microphone's terminal also cause the problem.
3. check those two filter coil near the microphones contact pads, have a continuity check between the microphone's contact pad's core to each corresponding filter coil. The inner layer core is the positive and the outer layer core which  is the negative.
4. Continue to check the line paths across  to microphones circuit as shown on repair guide solution above. Trace and make sure that both positive and negative line is not cut or does not have an open circuit.
5. The B+ line indicated in the guide is the microphone's circuit power supply, If this said supply voltage is missing or cut also causes the microphone nonfunctional.
A poor quality audio sound signal also occurs if there is a damaged components on that part.
6. The IC component solder ball bumps that holds the microphones connection can be used to trace those lines if an internal cut or damaged occurred, when all of the above hints does not solve the problem.

Nokia 1800 and Nokia 1616 Earpiece and Ringer Speaker Solution

Here's the repair solution to solve and fix nokia 1800 and nokia 1616 Earpiece and Loud Speaker (Ringer/buzzer) failure. In nokia 1800 and nokia 1616 the earpiece and ringer circuit have been combined and connected to a single speaker unlike the old types which  have both different speaker in each circuit.

The  below solution picture shows the line paths and layout of components for the Earpiece Speaker.You may trace all of those corresponding components if having trouble with the earpiece or Earpiece Audio sound problem. The positive and negative audio signal which flow across into four coils, a chip resistor 4.6 ohms and an EMI filter chip before it being feeds to the Speaker terminal pads and so on to the speaker. 

Nokia 1800 and Nokia 1616 Earpiece Speaker components layout and line paths

The two remaining components are chip resistors, this resistors are fusible resistors with has a zero ohms value. Both positive and negative Audio signals also flow into the two filter coils and the emi filter chip then feeds trough to the speaker.

Nokia 1800 and Nokia 1616 Loud Speaker ( Ringer/Buzzer) line paths and components layout

All those components are very easy to check and you may find a replacement on it if found busted or damaged. If all of its corresponding components were already replace and making sure that all of it working perfectly okay but the problem still exists and no audio sound can be heard over the speaker, we may now consider that the problem lies on the line paths between the main IC or the IC itself is being damaged. connections.

Nokia 1800 and Nokia 1616 Earpiece and Ringer IC component solder ball bumps connection

The last solution solution for this is to reflow, rework the main IC component. Be sure to check the line paths of corresponding solder ball bumps of the IC component which holds the earpiece or the  ringer loud speaker, after reballing it and inplacing it back.
Just be careful and have a good heat temperature and air flow control using you reworking station in handling the main IC module.

Nokia 1800 and Nokia 1616 Keypad and LCD Display backlight LED failure solution

This solutions shows the location of particular components or spare parts on the PCB board layout that might get damaged and cause the device for unable to light up the LCD display backlight LED's including the keypad backlight LED.

Nokia 1800 and Nokia 1616 LCD display backlights circuit components layout

This also includes the line paths of each particular voltage and current that feeds to the backlight LED's of the LCD display module from the inner most part of the main ic component solder ball bumps for deep troubleshooting analysis.

Repair tips: check and have a continuity test on all filter coils and each lines paths from where it is being connected according to the picture's layout.

Nokia 2710 Navigation Edition Solution for Charging Problem issues on

Here's the solution to repair Nokia 2710ne Charging problem issues when being damaged or occurred like, Not charging, unable to charge up the cell phone battery or it does not show the charging indication whatsoever.
This repair solution shows the location of each particular components that possibly might damaged if the said charging problem occurred.

Nokia 2710 NE charging circuit components location layout

The charging circuit of Nokia 2710ne is originally same us other nokai mobile phone devices. it is located at the bottom side of the PCB board isolated from other components.

Check up and repair tips:
1. check, clean or replace the charging pin connector and also see to it that the charging pin contact pads is al free from dirt and corrosion.

2.  check the continuity of the fuse by using a multimeter, if found busted replacing it is highly advice.
check the diode if it is shorted, a shorted diode may cause the fuse to blown again, replace it also and don't just remove it and leave it hang in there. In this method you can save the phone in the future when an excessive charger voltage may cause the trouble again.

3. All other components needs also to check, replace as necessary if the above solution does not solve the problem. just follow the instruction on the repair guide picture above according to it marked numbers.

Nokia 1800 and Nokia 1616 Charging problem solution

This solution shows the complete line paths of Nokia 1800 and Nokia 1616 charging circuit connections that can be used for repairing charging problem issues on the device such as, Not charging, Charging no response when inserted or it does not show charging indication when a charger is being plug-in.

Nokia 1616 and Nokia 1800 Not Charging Solution  ( circuit connection line paths )

Nokia 1616 and Nokia 1800 charging ways

Repair Procedure on Nokia 1800 and Noki1616 not charging problem.
procedure below may varies accordingly from case to case basis. 

1. Check the charging pin connector if its free from dirt and corrosion. Clean it if corroded or  find a replacement spare on it then replace it.

2. Check and clean the charging pin connector terminal contact pads.

3. Check the chip fuse if it is busted or damaged by using a multimeter. If found damaged, check the chip diode if shorted. Replace both of it the don't apply jumper on the chip fuse, this method can still save the phone in the future, if you apply jumper on it directly the phone will be dead if a short circuit happen on that particular area again and other than that, it's so very unprofessional way.
You can easily find a replacement of this spare parts component to other non working PCB board.

4. Check all the  components remaining as shown on the solution picture, a resistor marked R2200 is a fusible resistor which has a value of 0.55 ohms. This resistance value consider as fusible and may easily break or cut if a short circuit has occurs like a water damaged devices.

5. Those  transistor shown in the solution image  is the voltage regulator that holds and control the charging voltage from the battery charger. The small one has six legs on it and the other one which the big has three legs, just refer to the PCB board layout of your device for the exact component layout.
replace both of it if not so familiar to check those components. 

6. The last part needs adequate experience to perform if all of the above does not solve the problem,
Take note: you may do this at your own risk.. just don't do it if your just a beginner or you may end up killing the phone.  re-flowing and reworking the X-gold 110 chip needs extra care and proper training.

Nokia 1800 and Nokia 1616 Insert Sim Card Problem solution

Here's a complete repair guide to fix Nokia 1800 and Nokia 1616 Insert Sim Card problem issues. This solution shows the complete line paths of the SIM card circuit which we can used for easy troubleshooting procedures, including its connection to the IC components solder ball bumps.

Nokia 1800 and Nokia 1616 Sim card circuit connection layout

The Sim card circuit of Nokia 1616 and Nokia 1800 used an  EMI filter chip for the circuit protection.
This EMI filter IC can be damaged if an excessive electromagnetic interference or electrostatic discharge interfere with the circuit. The Vsim which is the voltage being supplied to the sim card to make it work also cause the problem if being cut or damaged, this voltage range from 1.8  to 2.4 volts, the voltage varies according to the type of SIM card.

Repair hints for Insert SIM card Problem repair procedures:
1. You may check the circuit surroundings first and see to it that it is free from dirt, foreign object and corrosion, a corroded components may also cause the problem, clean it first as necessary.

2. You may start to check the VSIM line paths continuity  by using a multimeter, start from the VSIM capacitor   through to the SIM card pin connector, to check if that said line is okay.

3. Check the ground line of the sim card pin connector, If the ground line is cut it also cause the problem.

4. Remove the EMI filter chip if the above check up is okay, check the EMI filter IC internal line paths, from solder bumps; A2 and A3 are the line for the the SIM data and the resistance value is 100ohms, B1 and B3 SIM reset, the resistance value is 100 ohms also and then C1 and C3 for the SIM clock signals which has a resistance of 47 ohms. Replace it if found busted or damaged, you can easily find a replacement for it in other non working Nokia cell phone models PCB board that has an EMI filter IC also, just look for the solder bumps configuration if it's same.

5. This part may need an adequate experience and extra care to handle with or you may end up killing the phone, if you are a beginner mobile phone techie  you may need to ask assistance to your head tech or a senior and most experience one technician before doing this procedure.
Now if all the above does not solve the problem, you may need to reflow, rework, remove the main IC labeled X-gold 110, then check the solder bumps continuity through to the SIM pin connectors, then reball it and in-place it back.

Nokia 1800 1616 LCD Display Problem - Lines and components Test and Tracing spots solution

This repair solution show the particular components and line paths of  Nokia 1800 and Nokia 1616 Lcd display signals. This guide can be used for quick troubleshooting and repairing display problem issues on Nokia 1800 and Nokia 1616.
This repair guide shows  on where and which particular components of the LCD data signal feeds across to a particular components, including even the solder ball bumps of the infeon X-gold 110 chip through to the LCD filter coils, resistors and LCD display module.

 There are two LCD voltages that feeds to the LCD module, the 1.8 volts Dc which is in color pink line and the 2.8 volts which is in green line.  The other four which are the display data signals.
This guide is useful when the display data filter coils and resistors already been replaced but the problem still exists. You can trace all of those corresponding line paths when the time that you need to remove, rework and even trying to replace a new IC.