Powers on after sitting, then won't power on again
Hi! I've got piles of iBook G3 laptops with power issues, mostly 500s and 600s. These laptops will generally power on after they have been sitting (days, weeks, months) without a power source, but inevitably once they have been turned on one or two times, they fail to power on again. It's the most frustrating thing ever, because I'll build them and then discover they have this problem just as I'm finished. The problem is not the DC-in, as I have replaced the DC-ins on many of them with known-good DC-ins, and the light on the DC-in behaves normally and does not show weird colors or go dark, or flicker. It's not the battery (I generally don't give them batteries), and it's nothing to do with PMU/PRAM resets, or the expansion RAM -- I've tried every variation of all that. Clearly there is something on the board itself in these machines that discharges when the machine sits for a period of time, and when it gains a charge again, the laptop no longer works. iBooks don't have PRAM batteries, so there's no battery to swap out. Anyone have ideas? It would be nice to save all these laptops. Aside from this bizarre issue, they are in seemingly good shape, and most of them have never been worked on. Thanks!
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