Good day all,
I need the power of the collective internet to help me identify the best approach to fixing my Monitor.
Problem this morning turned on the monitor it came on was dark and then screen was black - sound works fine as well as the PC know's it's there. I have 2 monitors connected to my PC.
My Philips BDM 4065UC was flickered a few times before turning on.
1.) Does anyone have a schematic for a 715G6985-P01-000-002R
2.) anyone know what the common causes of this type of failure
thanks in advance
Always test the power supply first.
Also test if there is really no picture or just the backlight is not working, aka flashlight test.
The Logo comes on so there is picture - the logo is very dark however
it's as if the backlight driver has failed now not sure where that would be and how to test that properly
On the top left corner of your first picture where "RoHS" logo is.
Check for voltage on the LED supply as mentioned by Manul.
Often a single defective LED is the cause.
A megohmmeter or any supply with enough voltage and current limiting can be used for a quick LED string check. You must get the polarity right first time though.
As shakalnokturn said, it is probably LED failure. You can measure ouput voltage (if I read correctly from picture it is marked +VLED and -VLED). Measure with backlight connector connected and then disconnected. If the voltages measured are very similar, that probably means that the LED strip is open circuit (could also be PSU failure, but unlikely). If the voltage is zero then it means PSU failed, LED strip is shorted or it could be a fuse (I see a fuse in the picture, presumably for backlight power output, small rectangular soldered on the board).
Hope this helps to get started, but be careful of high voltages and don't harm yourself. Backlight voltage could be quite high, not to mention the main bulk capacitor of the PSU.