Any hints or pointers gratefully received!
Symptoms:
Machine was working fine, I have been using it probably a few hours every other night over the last few weeks, booting from a SCSI2SD v6 attached to the internal scsi. Couple of days ago it started cold booting to the flashing ? disk, but would then boot normally after a restart. After doing that a couple of times it changed to booting to blank gray screen with cursor, then a long (~20 seconds) delay, and then the flashing ? disk, and no amount of coercion will persuade it to find the boot drive. I have a few other drives including a micropolis HD and the 800's cd300i caddy loader, all verified working in my 700, but all fail in the 800. I don't currently have any other means of booting it, I doubt the floppy drive is working and I don't have any boot floppies for it anyway. I also don't have any external scsi drives I can plug in to see if it's just the internal port that's dead, but I am working on acquiring something to test that. It does still chime normally, so I'm guessing it's something with the scsi controller directly...
I also mounted the 800 board in my 700 to rule out PSU issues, to no avail.
One notable data point is that the cd300i did not even try to eject when starting up with the mouse button held down...
Background, for context.
I got the Quadra 800 in bad shape a couple of years ago, I bought it mainly because the plastics were intact and in good order. It had been stored in someone's shed and had had paint thinners or something like that leaked all over it, completely destroying all the metal parts of the case and the PSU. In spite of all that the logic board was in really pretty good shape. There are a small number of IC legs that are slightly dull I guess from vapour from whatever was spilled on it as there is no evidence of liquid contact with the board. Nothing too bad at all, and the pcb itself is immaculate. I rebuilt it with a replacement PSU and some case parts donated by a dead 8500 that someone was parting out on ebay, and have been using it that way since.
@trag , I noticed in another thread you had acquired a large quantity of 53C96's, might you be persuaded to part with a couple of them? Assuming they are the 100 pin QFP variant... They seem to be pretty difficult to acquire except in bulk quantities... I assume the 53CF96, while pin compatible, is not a drop in replacement?
Symptoms:
Machine was working fine, I have been using it probably a few hours every other night over the last few weeks, booting from a SCSI2SD v6 attached to the internal scsi. Couple of days ago it started cold booting to the flashing ? disk, but would then boot normally after a restart. After doing that a couple of times it changed to booting to blank gray screen with cursor, then a long (~20 seconds) delay, and then the flashing ? disk, and no amount of coercion will persuade it to find the boot drive. I have a few other drives including a micropolis HD and the 800's cd300i caddy loader, all verified working in my 700, but all fail in the 800. I don't currently have any other means of booting it, I doubt the floppy drive is working and I don't have any boot floppies for it anyway. I also don't have any external scsi drives I can plug in to see if it's just the internal port that's dead, but I am working on acquiring something to test that. It does still chime normally, so I'm guessing it's something with the scsi controller directly...
I also mounted the 800 board in my 700 to rule out PSU issues, to no avail.
One notable data point is that the cd300i did not even try to eject when starting up with the mouse button held down...
Background, for context.
I got the Quadra 800 in bad shape a couple of years ago, I bought it mainly because the plastics were intact and in good order. It had been stored in someone's shed and had had paint thinners or something like that leaked all over it, completely destroying all the metal parts of the case and the PSU. In spite of all that the logic board was in really pretty good shape. There are a small number of IC legs that are slightly dull I guess from vapour from whatever was spilled on it as there is no evidence of liquid contact with the board. Nothing too bad at all, and the pcb itself is immaculate. I rebuilt it with a replacement PSU and some case parts donated by a dead 8500 that someone was parting out on ebay, and have been using it that way since.
@trag , I noticed in another thread you had acquired a large quantity of 53C96's, might you be persuaded to part with a couple of them? Assuming they are the 100 pin QFP variant... They seem to be pretty difficult to acquire except in bulk quantities... I assume the 53CF96, while pin compatible, is not a drop in replacement?
