LED driver board smoked - but why?
My daughter's 2009 iMac lost its display over the weekend, along with a burning smell. When I opened the case (much easier than I expected) I found that the LED driver board had a couple of cooked components - the middle one of the three large transistors on the underside (Q2 in the image located at https://d3nevzfk7ii3be.cloudfront.net/ig...) and the large inductor next to it looked brown as well (L2 in that image) as well as the diode SD2 on the other side. So clearly those devices are part of a power supply circuit which was trying to supply more than its rated current and failed.
My question is, if I replace this board with a new one, is it likely to fail as well? As in, did it happen because of a short somewhere else? There doesn't seem to be other damage but I do know the front of the computer was wiped down with a damp cloth earlier in the day. It was working for at least an hour after that, but still.
If anyone knows the setup of these machines well, could you suggest where to look for possible problems? Or should I just replace the board and cross my fingers?
Thanks for any advice,
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