Chosen Solution
Hi, my Sony KD-65X9000B TV won’t start up, it just has a red light that flashes four times and no other response. The components on the power board look mostly ok but there is a slight smell around the top left of the board near the capacitors and diodes up there and it looks like heat has affected the insulation on those primary/secondary coils. On the backside of the board there also looks like heat stress around those diodes. Any suggestions, should I try to re-solder? Thanks for looking.
@batfink066 this is a bit hard to make out but it appears as if D6602 and D6603 are lighter and slightly grey in appearance (could also be totally normal just bad eyesight on my part;-). could be an issue with bad diodes. If nothing else I would replace those first. Use a multimeter and check the outputs to the main board on connector CN6401. Use the legend below it to see what values your board should show.
