On the bottom side of the board, there are 4 MOSFETS (8-PIN) on the right side by the transformer, please get the numbers on them. you should also check the transformer resistance of the inverter transformers (pin 5 and 6) as suggested in the link.
We are looking for resistance reading as explain in the link. Pin 5 and 6 is the secondary side (high voltage winding), the should be within 3% of each others.
9? What is that? It should show xxx Ohms. Over Range more likely.
What are the number as printed on the transformers? I may have to look up the pin outs.
I looked at the bottom side (pictures are not well focused) of the board and looks like pin 5 is not used.
There are 6 pins on each transformer, so you will have to put one probe on pin 6 and probe the other 4 pins to see which one is connected.
6&1 = xxxOhms
6&2 = xxxOhms
6&3 = xxxOhms
6&4 = xxxOhms
Two of them look almost the same, but the last two look bad. Are you able to get the numbers printed on the side of the transformers so we can look up the spec?
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