Posted By
MMS
on 2017-08-24
20:41:08
 |  Re: Possible 8501 replacement kit?
@filker
OFF I had a Apple G4 motherboard, when it got warm, one of the IC legs on the corner separated (due to torsion happened on IC due to heat) from the motherboard, as the soldering was broken (in fact it was the top1 faiilure mode of that laptop range, and seems to be a design issue).
When I pressed hard the top of that component (it was an inverter IC), then the laptop still worked.
From the sympthoms and the list of exchanged (and OK) parts does not look anything serious, but something that plays a role in the RAM refresh process and in warm condition do not make this. Missing this regulatar updates, the DRAMs start to loose their information after some time.
Unfortunately I am not a HW expert, but worth to check that part of circuitry, looking for a loose / cracked soldering on an IC or component leg.
The Mac case:
http://macintoshhowto.com/hardware/how-do-i-get-my-broken-g4-ibook-fixed.html
(hopefully somehow you can use it to find the failure mode and able to get back the Plus/4 from sub zero state)
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