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1 Logic board schematics and testing procedures needed
I've inherited a "fried" imac from a friend. The machine was reportedly hit by a power surge from lightning although a surge protector was used. The machine will not power on, no boot chime, etc. I have reset SMC and the fans kick on in high speed but machine will not boot. I took apart the machine and inspected the logic board for burns, etc. and could find nothing. Replaced the RAM; nothing. Power supply tests out fine and I even replaced with a new unit; no change. On the logic board, I get LED#1 when the machine is plugged in, but when switched on, no other lights ever light up. I can get the fans to come on at high speed, the hdd and cd drives sound like they're getting power. My question is; I see all of these logic board repair services out there, what are they normally fixing and where are they getting their schematics etc from? This is not my everyday computer so it's kind of a hobby project at this point. Ultimately, if I cant fix it, I will probably have a pro get it going, but I would like to give it a shot.
2.6千 
10条评论
To any of you following along, schematics are available here:
http://www.laptop-schematics.com/
Cost is approx. $30 per machine.
由 info251 完成的
seems a shame to buy the schematics and have taken the mac apart just to give it to someone else to fix... give it a shot. we all start somewhere and mayer is a very clever/helpful man!
由 pollytintop 完成的
Well thank you Polly. You got me to blush
由 mayer 完成的
I'd spend some money on trying to get the valid schematic for your computer. Since you described it to be hobby, what better way than to get the Mac revived with the help of the experts on here and to follow their advise. mayer is always a great source of experience and knowledge. Good Luck.
由 oldturkey03 完成的
ABCellars, why would you vote to remove this as spam/offensive? Am I missing something?
由 oldturkey03 完成的
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