I was browsing and have noticed quite a few unresolved threads surrounding video/startup issues with the Mac IIci. My pledge to the forum is that when I solve my own issues, I'll post a follow-up with the solution (if there is one)
I've got a recapped IIci board that has a couple of issues. Firstly the startup circuit - powers up immediately after plugging it in. Pressing the power button causes it to momentarily power down but it'll immediately turn back on. I've verified all traces connecting UB13, UD13, and UE13 have continuity. Next step here will be to replace the chips themselves.
The more pressing issue is that I get a black screen after the chime. Using my trusty Samsung LCD monitor (known to work with the Mac II series), the display "turns on" but screen remains black. If I press the reset button it'll show some garbled nonsense until I release the button. Then it's black again.
It does chime, so I thought that maybe it was actually booting in the background - nope. I tried a BlueSCSI and Floppy EMU. No disk activity on either. I'm very stumped! It's not like the IIsi, where the RBV chip is near caps so broken traces are expected. Chips on this board look clean. I guess I'll have more time with the meter on beep-beep mode to probe stuff out...
I've got a recapped IIci board that has a couple of issues. Firstly the startup circuit - powers up immediately after plugging it in. Pressing the power button causes it to momentarily power down but it'll immediately turn back on. I've verified all traces connecting UB13, UD13, and UE13 have continuity. Next step here will be to replace the chips themselves.
The more pressing issue is that I get a black screen after the chime. Using my trusty Samsung LCD monitor (known to work with the Mac II series), the display "turns on" but screen remains black. If I press the reset button it'll show some garbled nonsense until I release the button. Then it's black again.
It does chime, so I thought that maybe it was actually booting in the background - nope. I tried a BlueSCSI and Floppy EMU. No disk activity on either. I'm very stumped! It's not like the IIsi, where the RBV chip is near caps so broken traces are expected. Chips on this board look clean. I guess I'll have more time with the meter on beep-beep mode to probe stuff out...