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Home Forums troubleshooting Quadra 800, no power up — #10 troubleshooting Quadra 800, no power up — #10
Post #10 by wilykat
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Got a replacement PSU in.  5v standby checked good. Plugged it all in, power on

BOOOIIIINNNNG!!!

It works!!  The hard drive included had OS 7.6 and a bunch of old files from a check apps. The last date were over 15 years so it's a good bet any sensitive info is useless. Going to wipe the disk clean and install fresh 7.5 then work on file transfers. No game or anything interesting for me there, I think it was primarily used to manage paycheck of a small company.  It keeps trying to access networked server which probably held the main database with names, addresses, and other info for printing checks.

First: recap. The startup chime sounded weak even at volume 7 so the caps are probably starting to go bad.  Remind me to take nice clean picture of the motherboard and note all the caps and its rating since I didn't find useful info for this specific model (or C/Q650 which has same layout)

Next: DOS card, and maybe a nice powerful SCSI card so I can boot faster than onboard SCSI :D Also the Video Spigot card and put in the memory sticks.

I discovered one issue: my LCD looks dang ugly if it's not run at native resolution of 1280x1024.  Yet some games won't run right if it's not set to 640x480 anyway.  I did check and it runs at 800x600@56Hz but looks about as bad.  I am using Apple supplied VGA adapter that originally came with Apple Basic Color Monitor so I am limited to this 2. I might look for a different adapter with switches to get higher res and use higher res for apps that do support it and go 640x480 for games.

PS with working PSU I can compare with dead one to trace voltage and find the dead part.

mp.ls