My G4 desktop won't cold start. I have to plug in to the outlet for about 15 minutes every time. Can anyone explain why?

My G4 desktop won't cold start. I have to plug in to the outlet for about 15 minutes every time. Can anyone explain why? Otherwise, the desktop runs fine.
The battery is new, and I zapped the little button on the main board once. I've noticed that the power supply plug is a little longer than the usual one for G4, and the AGP slot has an extra slot, which is black and about half inch long.

Hi Ursula,
the AGP slot has an extra slot, which is black and about half inch long.
I believe that is for ADC Monitor power if you had one, or a card with ADC, like the little tab on this one...
I think your startup problem is bad capacitors in the power supply or on the logic board, and the need to bleed off their charge before they work right to start.

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My G4 desktop won't cold start. I have to plug in to the outlet for about 15 minutes every time. Can anyone explain why?

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