Here's a solution for Samsung I5500 Galaxy 5 LCD Screen Display Backlight Failure Problem that result to a dark screen display. This phone is also known as Samsung i5500 Corby Smartphone, Samsung Galaxy Europa and Samsung Galaxy 550 so its the same thing on the PCB components and don't bother how such a lot of names exists.
Okay, this solution works if the LCD screen shows a dark screen but the phone is still turns on and can hear tones etc. The first thing comes in our mind is to replace the LCD screen module but still it display nothing.
If the LCD screen goes blank or black and can notice that some text or image shadows on the LCD screen it means that the backlight white LED on the screen is not working. The problem may lies either on the LED that is mounted on the back of the LCD itself and or the showed components showed on the solution below.
To fix this problem more quickly you may first to replace the LCD screen module and or check the LCD LED driver components on the Samsung I5500 Galaxy 5 PCB board. If you have no LCD replacement at hand or available, you may first check the components as showed on the solution below before buying a new LCD screen module.
Here's some hints on how to fix Samsng I5500 Galaxy 5 LCD Screen Display Backlight Problem:
1. Visually check the LCD pin connector. Clean, rework and replace if necessary.
2. Check the VLED+ voltage, you can check around 26V on the capacitor.
3. If the voltage is missing or no readings, check the VBAT voltage 3.7 volts across the filter coil. check also that coil for possible open circuit or damaged.
4. If the VBAT voltage is okay. trace the VLED+ and VLED- connection line paths down the LCD pin connector.
5. Check, resolder and or replace the LCD LED driver IC if necessary.
Okay, this solution works if the LCD screen shows a dark screen but the phone is still turns on and can hear tones etc. The first thing comes in our mind is to replace the LCD screen module but still it display nothing.
If the LCD screen goes blank or black and can notice that some text or image shadows on the LCD screen it means that the backlight white LED on the screen is not working. The problem may lies either on the LED that is mounted on the back of the LCD itself and or the showed components showed on the solution below.
To fix this problem more quickly you may first to replace the LCD screen module and or check the LCD LED driver components on the Samsung I5500 Galaxy 5 PCB board. If you have no LCD replacement at hand or available, you may first check the components as showed on the solution below before buying a new LCD screen module.
Here's some hints on how to fix Samsng I5500 Galaxy 5 LCD Screen Display Backlight Problem:
1. Visually check the LCD pin connector. Clean, rework and replace if necessary.
2. Check the VLED+ voltage, you can check around 26V on the capacitor.
3. If the voltage is missing or no readings, check the VBAT voltage 3.7 volts across the filter coil. check also that coil for possible open circuit or damaged.
4. If the VBAT voltage is okay. trace the VLED+ and VLED- connection line paths down the LCD pin connector.
5. Check, resolder and or replace the LCD LED driver IC if necessary.
