Acer x163w Monitor PSU schematic

[atunguyd]

Ii wonder if anyone can help me. I have a Acer x163w monitor which is not powering up. The PSU main capacitor's one leg had completly come off - I replaced it but the PSU is still not outputting DC. I found the monitor in questions service manual here on manuals lib but the schematic in there is a completely different - the schematic shows no mosfet to drive the transformer while the one I have does use a mosfet - also the schematic shows only one optocoupler but mine has two.
The PSU board is labelled FM-20A02-AAA made by APD as per the image below. I am trying to find a schematic for this board.



Also the switching chip on this board has minimal markings on it - could anyone identify this? It is fed from a voltage divider from the high voltage side and I am measuring 12v coming into it.



Thanks in advance

Anthony

[atunguyd]

Feedback on this - gave up trying to repari the PSU - I think the transformer suffered a short or the switching chip is dead. The primary PSU outputs 14v and 5v with the 14 going to the DC-DC upconverter to 600v for the backlight and the 5v for the logic board. I removed the transformer to isolate the primary PSU and then added a DC jack to the 14v rails, then just added a small cheap buck converter board to bring that down to 5v and feed the logic board. I now have the monitor working perfectly from a 12v external brick power supply.