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| Click here to select a new forum. | | PM 5500: Frequently soft pwr only starts drives, monitor init - no chime, no boot | Posted by: estravolta on 2024-01-06 14:32:54
I recently got a Power Macintosh 5500/225. For a few days when I'd power it on, it would come on no problem. After installing an IDE-to-CF adapter it started getting finicky and when I would apply soft power I could hear power go to the display, and the CD/floppy drive would make noise, fans on, etc. but no startup chime and it wouldn't boot.
Other details:
* This happens with and without the OEM spinning HDD
* Boots more frequently with the OEM HDD but has booted successfully with the IDE-to-CF card
* PRAM battery is dead
* I've tried booting without any expansion cards, same situation
* When operational, the screen with enlarge slightly (maybe 1mm on all sides) when clicking on certain items (like when I open Mac HD from the Desktop)
* Multiple keyboards tried
Any ideas? TIA | Posted by: wottle on 2024-01-06 14:51:12
I believe no PRAM battery is better than a dead PRAM. I don't believe the 5500 requires a PRAM battery to boot (at least mine doesn't). However, the symptoms feel like a dying power supply. Sending wrong/fluctuating voltages to the analog board might explain the enlarging of the image during certain tasks... | Posted by: cheesestraws on 2024-01-06 15:15:25
Agreed; I'd be looking suspiciously at the power supply to start with with these symptoms. | | 1 |
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