Chosen Solution
I know it’s kinda old, but have been working fine until today, turned it on and got black screen after 5 minutes. Took the TV apart (back panel) to see if there was a normal fuse to replace. There is a fuse but it is fine. SO is there a scheme that i can search through to measure everything else for error? I have some experience about the electronics, been modifying xboxes and playstations a couple years ago. Please feel free to contact me in this matter, i’m from Sweden Update (03/19/2022)
@gutex first thing you want to try is to unplug the TV and unplug all accessories connected to it. Then hold the power button depressed for something like a minute or two. After that plug one video source, preferably local like game console, DVD/BR player etc. and see if you now get video. If not the check in a darkened room, shine a flashlight at an angle against the TV screen (TV must be on and you have to have sounds etc.). If you can make out shapes, silhouettes etc., then you know that this is a backlight issues. In case of no picture when CSM (Customer Service Mode)is activated (How to Activate CSM: Key in the code “123654” via the standard RC transmitter. Note: Activation of the CSM is only possible if there is no (user) menu on the screen!and backlight doesn’t light up, it’s recommended first to check the LED drivers on the power supply board and next the backlight strips (most likely the culprit since that would be a common Philips issue). Here is the service manual for Philips Chassis QFU 1.2E which does have the PCB diagrams/schematics.
