Recent content by Duke09

Well the issue is System 7 will not boot at all. It was suggested to me by someone else that System 7 needs a working RTC circuit unlike system 6, not sure if that is true. But I am still stumped on why it will not boot into any version of System 7 I’ve tried, it either hangs onto Welcome to...

Did both VIAs and the RTC chip, no change.

I haven’t really touched it since, so haven’t tried replacing those yet.

Just various ram stick it’s matched pairs installed, but no matter what combination they are in or if any, same results. I should be getting at least jail bars with nothing installed but I don’t.

Hello, I’ve got this SE/30 that I’ve been trying to troubleshoot for quite some time now. It’s been recapped, the analog board works with a working SE/30 board. I’ve tried and swapping all the swappable chips from my good SE/30 board to my bad one, no difference. Replaced UE8, UF8 and the...

Thanks for the suggestions. I spent a few more hours and found two more bad traces from the ROM to the CPU, and I assume the damage is under the ram slots. I tried fixing those two but it made things worse somehow. At this point I have spent too much time on it and will just part the machine...

I’ve got a Macintosh iisi that turns on and chimes. It will output either a grey, yellow or purple screen for a second then the monitor will turn off. With no ROM it will stay on a solid color indefinitely. It also does seem to boot off a floppy disk and the cpu does get warm. It seems like a...

It does chime and it does boot into the OS as I can hear Mac OS make some noises

Recapped the display on a powerbook 145, replaced one of the caps on the inverter and replaced the display cable with a new one. But I only get the backlight, nothing is displayed on the screen. I checked for continuity between each pad and trace for the caps and all were good. Any ideas what i...

Just read it now. I’m not familiar with the VIA chip but I’ll look for it when I get around to it tonight. What part of the board is it at?

Yeah Ive had it for a few years. When I initially got it, it was fine. I recapped it a bit later and it was still good. Then after awhile once the recapping was done it would only boot sometimes off the 7.5.3 hard drive, then stopped all together. It only works 100 percent of the time off system 6.

Yeah I can give that a go. I’ve also thought about using snooper. I can load both those onto a system 6 version and give both a try.

I recapped it long ago, all SMD and axiels. Also replaced the scsi chip and fixed bad traces around the scsi chip.

Ive tried a bunch of different known working scsi hard drives. stock ROM simm. I’ve tried different ram. I believe it fails to boot off syste 7 floppies as well, system 6 ones work iirc. I recently just got some blue scsi so it will be easier to test now.

Well system 6 boots perfectly fine, and system 7 will either hang on welcome to this macintosh or throw a system bomb error. I was told by someone else system 6 doesn’t require the RTC to work but system 7 does, so that’s why o believe the RTC circuit is bad.