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New logic board for older G5 iMacs with bad capacitors
I have been replacing caps on those boards for a while now. Seems that 4 out of 5 are fixed simply by replacing the caps. One should really have to replace the whole burned out bank (not just the individual cap that is oozing.) It seems that depending on what caps are going; the power supply can be damaged by the failure as well sometimes (or was contributing to the cause of the rupturing) I'm not really sure. maybe 1 in 4 of the units with burned caps need a new power supply; Some of these are the QM4/QM7 that was originally covered under the replacement programs apple have; sometimes the burned out power supply is the newer model. Sometimes the power supply works but is humming terribly. I've seen others go into it in detail on the net. Apparently the failing caps can damage the regulators or rectifiers somesuch; not sure on details. |
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