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A display problem like, white screen (WSOD), blue screen, blank or black screen, saturated and garbled screen displays , can be cause  by a  faulty or damaged LCD screen display and can be fix by installing anew LCD replacement on it. Sometimes an interrupted firmware also causes the problem and can be fix by restoring the device firmware. IF all of the above does not solved the problem you may then consider that the problem lies on the hardware components failures. The solution below will show us a particular hardware components that holds and control the display data signals on Nokia N97 mini which enable the LCD screen to work. Nokia N97mini Display Problem solution The LCD display connector may also cause the problem if being corroded and oxidation occurs, cleaning it  first is a good idea. If the device suffered like wet damaged, accidentally heavily dropped the display controller IC and its particular line paths  may also possibly damaged. Reworking and ...

This solution can be used as  a guide to fix or repair Nokia N97 microphone problem issues. A failure that no voice can be heard from the caller on the device. This solution solution shows the components location of Nokia N97 microphone circuit that needs to be check if the problem occurs. Nokia N97 Mouthpiece Microphone Solution Repair tips: Ensure to restore or flash the device firmware first before trying to calibrate hardware components. If flash firmware updating  is already been done and nothing happens , you may then proceed to troubleshoot hardware components. a) Trace and check the supply lines paths of the microphone module. b) Check and or replace the resistors highlighted on solution above, the two resistors have 0 ohms resistance value while the other one has 100 ohms. c) If all the resistors seems all working and or already replaced and the supply voltage is okay, you may then replace the digital microphone module. For further troubleshooting Nokia N97 Microp...

Here's the solution for Nokia N97 Charger Problem that shows no charger response or indication on the display when the charger is being plug-in. The solution below shows certain components that needs to check or replace if this problem occurred on Nokia N97. Nokia N97 Not charging solution, charger no response problem The solution above shows the charging protection circuit of Nokia N97, these are composed of a chip Fuse and a protection Diode; If this two components will breakdown or damaged it will result to Not charging problem such as charger no response on Nokia N97

Here's the solution to those who are looking for a quick guide in repairing Nokia N97 left and right ringer, hands free loud speaker problem issues like there is no audio sound can be heard over it. This solution can be applied if the device speaker is working okay but still there is no sound output can be heard on it. The solution below shows the Ringer or Loud Speaker Audio circuit. It indicates certain components that needs to be check and or replace if found faulty or damaged. Nokia N97 Left and Right Ringer Loud Speaker Repair Solution Check and ensure first that speaker is working or already tried installing a replacement spare on. If the speakers were okay, you may then proceed to check those components showed on the solution above. There are filter coils connected on the circuit, you may first check this components. For the LEFT speaker problem , you may check that the flex cable is not damaged before trying to check or replace the filter coils. If all coils or induct...

Here's the solution for Nokia N97 Earpiece Speaker No audio sound can be heard over it from a caller. This solution may only works and can be applied after ensuring that the Earpiece Speaker and the Flex cable wire is working okay or already replaced but seems nothing happen and the problem still exists. This solution below shows the line tracks of the earpiece speaker connection to certain components that needs to be check for further earpiece speaker repair on Nokia N97. Nokia N97 Earpiece Speaker No Sound Repair Solution  If the speaker and the flex cable is already checked or been replaced but does not solved the problem you may then check the corresponding components shown on the solution above. There is a Filter Coil and an ESD Protector chips is used in the circuit, you may start to check on that spots. You may also trace the line paths from the Flex Pin connector through to the said components. If those components seems working well or already tried by replacing th...

Here's the solution for Nokia N97 Send, End and Menu button keys not responding problem. This solution may possibly help fix and solved if the upper keypad keys stop working. After ensuring that the upper keypad flex is okay but still the Send, End and Menu keys won't work you may then use and apply this solution below. Nokia N97 SEND, END and MENU keypad keys failure Solution The above solution shows the connection of the upper keypad keys line paths from the pin con connector through to the EMI-ESD filter chip. This filter IC also shared and being used for the camera module . So if both camera and and the upper keys are not working you may suspect that this chip is faulty or already damaged. If the flex cable is okay and or already tried replacing a new one but the problem still exist, you may then check and replace the EMI-ESD filter IC. And don't forget to ensure that the pin connector is perfectly clean.

Here's a solution for Nokia N97 backlight LED on the QWERTY keys not working or failed to light up. This solution can be used if the keypad membrane flex is not damaged but the LED backlight still won't light up. Nokia N97 Backlight LED Not Working Solution The solution above shows the qwerty keypad backlight LED circuit, it is composed of LED driver IC and filtering Resistors. These Resistors has a 0 ohms resistance value, you may check first these resistors before troubleshooting  further. The LED driver needs the Battery Voltage which is 3.7 volts that came across with red color highlighted component Resistor, check that voltage and continuity to the battery B+ terminal. If all the Resistors were okay, you may then proceed to check or replace the LED Driver IC.

Here's the solution that may possibly help fix and repair a damaged or malfunction qwerty keys on Nokia N97. This solution works if the N97 qwerty keypad membrane is already been replaced but some of the keypad keys still not responding. The solution below shows the line paths of the Qwerty keypad connection of Nokia n97 PCB Board. This connection pattern shows the tracing guides including the qwerty keypad filter IC through to the Keypad pin connector. Nokia N97 QWERTY Keypad Failure Solution N97 Keypad Filter IC Jumper Ways There are two keypad filter chips used on Nokia N97 keypad circuits. You may check and replaced these EMI-ESD filter IC after ensuring that the QWERTY keypad membrane flex seems working fine and or already tried to replace a new replacement spare. Check and ensure also that keypad Pin connector are of free from dust and oxidation build up.

Here's a solution for Nokia N97 display problem hardware related issues that can't be fix by means of  software. This solution may possibly help fix and repair Nokia N97 LCD screen display problems such as white screen , blue screen , blank or black screen, garbled or saturated screen displays. If already tried to restore or flash the device firmware and or already tried installing   a new replacement LCD screen module you may need to check the components showed on the solution below. Nokia N97 Display problem - hardware repair There is a Display EMI filter mounted besides the LCD pin connector, you may check and trace the line paths from the pin connector before replacing a new replacement spare IC. If the Display filter IC seems working or been replaced but the problem still exists you may proceed to rework or replace the Display Controller IC .

Here's the solution for Nokia N97 touch screen doesn't work or respond problem. This solution may works if already tried to restore , flashed, upgraded or updated the device firmware and also tried to install a new replacement touch screen module but the touch screen still won't work. The solution below shows the location of certain components that need to check or replace if the touch screen of Nokia N97 stop to respond or not working . Nokia N97 Touch Screen Not Working Repair Solution There is an ESD filter IC is being used on the touch screen control circuit, located beside the LCD pin connector. You may check this filter IC and replace if found damaged. If the Filter IC already replaced but the problem still exists, you may proceed to rework the IO expander IC, the IO expander IC also controls the keypad keys. If both keypads and touch screen won't work you may suspect that this chip is faulty or damaged.

Here's the jumper solution for Nokia N97 damaged or lifted USB pin connector terminal pads on the PCB. This solution shows the alternative jumper ways to solve the problem . Nokia N97 damaged charging pin jumper ways- charging problem solution  Note: components mounting configuration may differ from original PCB Board If the solder pads is lifted you may apply jumper to corresponding components shown at the solution above.