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Dell Optiplex 980 SFF error code 34 or 3 after force shut down
I have a Dell Optiplex 980 SFF 12 GB RAM, i3 540, PNY GT 730, Samsung 840 EVO SSD. After a force shut down, error code 3,4 or 3 flashes and the PC won't turn back on for an hour or so. I don't know what causes this but I'm sure somebody out here knows. I don't usually do force shut downs unless it freezes which happens sometimes.
bradthetechnut
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6 Professor
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September 11th, 2022 11:00
A little caveat if trying a PSU tester. If I remember right @redxps630 , 980 MB's have mini 24-pin connection instead of standard 24-pin. For PSU tester, 24-pin to mini 24-pin adapter would be needed.
bradthetechnut
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6 Professor
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September 11th, 2022 11:00
Try replacing size 2032 CMOS battery.
Remove GPU and use onboard graphics. How does it behave?
Optiplex 980 Service Manual has diagnostic lights.
Also sounds like a PSU on it's way out. 2 ways to test: 1. Try another PSU. 2. PSU testers on Amazon. Before going through the PSU possible trouble, go according to diagnostic lights after changing battery.
redxps630
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September 12th, 2022 09:00
agree that replace cmos battery is good idea. also try clear cmos settings by using motherboard RTCRST jumper. see diagram below. move blue jumper on #15 to #2 pins x5 sec then move back. do not think it is psu issue.
bradthetechnut
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September 12th, 2022 10:00
Link above has too many pop-over ads. Service Manual has none. If diagnostic lights change after replacing the battery, see diagnostic lights in the Service Manual. Easy search using "diagnostic lights."
bradthetechnut
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September 13th, 2022 10:00
Hi @redxps630,
You deleted your post (no need), but I still saw the email. Thanks for a suggestion of using Safari. All I could turn off in Chrome is ad personalization.