MOS8_030
Well-known member
So I replaced most of the caps on a Plus analog board today. I say most because I screwed up and didn't order all the caps I needed.
But it was enough for the moment. I also re-geared the floppy drive while I was there.
So I put the system back together and booted it from a floppy.
It came up fine, the screen is still little dimmer than I'd like, but everything looked ok, set the clock, checked to see if saw 4mb of ram, etc. then shut it down.
Then the weirdness started...
I shut it down for only a minute then turned it on again to boot from the same floppy and it started to boot, gave a smiley mac for a second, then spit out the disk.
The condensed version: It booted up fine one time and there after it refuses to boot up, spitting out multiple bootable floppies from three different drives.
Won't boot from SCSI either.
I even swapped out the Plus mobo and memory with another board and it did the same thing! (wtf?)
Is it possible the remaining old caps on the analog board could cause this behavior? (The ones hi-lighted in red.) Doesn't seem likely.
Anyway, I ran out of time so I'll look at it harder tomorrow.
But it was enough for the moment. I also re-geared the floppy drive while I was there.
So I put the system back together and booted it from a floppy.
It came up fine, the screen is still little dimmer than I'd like, but everything looked ok, set the clock, checked to see if saw 4mb of ram, etc. then shut it down.
Then the weirdness started...
I shut it down for only a minute then turned it on again to boot from the same floppy and it started to boot, gave a smiley mac for a second, then spit out the disk.
The condensed version: It booted up fine one time and there after it refuses to boot up, spitting out multiple bootable floppies from three different drives.
Won't boot from SCSI either.
I even swapped out the Plus mobo and memory with another board and it did the same thing! (wtf?)
Is it possible the remaining old caps on the analog board could cause this behavior? (The ones hi-lighted in red.) Doesn't seem likely.
Anyway, I ran out of time so I'll look at it harder tomorrow.