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5320
October 5th, 2019 22:00
Optiplex 990 2,3,4 flashing + power button + menu on startup
When I turned on the PC I get 3 lights flashing amber and those numbers are 2,3,4 and the power button is also amber. On startup I get 4 alert signs:
Air temperature sensor not detected
Cpu 0 fan failure
Hard drive fan failure
Keyboard installation failures.
And then I get 3 options:
To continue press F1 key
To change setup option press f2 key
To run on-board diagnostics press f5 key.
I have tried doing theses options but nothing happens. Maybe due to the keyboard error alert?
No Events found!
JOcean
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October 6th, 2019 05:00
The following might help but as with the forum post below, it sounds like a PSU problem with so many errors. However with all 3 amber and the power button amber that could also be a corrupt BIOS. Have you tried to replace the CMOS (coin cell ) battery yet?
https://www.dell.com/community/Desktops-General-Read-Only/Optiplex-990-Amber-Light-2-3-4/td-p/4395061
https://www.dell.com/community/Optiplex-Desktops/990-MT-Amber-Power-light-and-blinking-2-3-4-no-beeps/td-p/6240342
https://www.dell.com/support/article/us/en/19/sln284978/a-reference-guide-to-the-dell-optiplex-diagnostic-indicators?lang=en#2009_to_2012
Coona
2 Posts
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October 6th, 2019 15:00
Just replaced the CMOS battery. Still doesn't work. No different changes.
speedstep
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47K Posts
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October 7th, 2019 06:00
Changing cmos battery does not repair bad Power supply.
Blinking Amber power button = bad power supply.
990 tower can use regular power supply like EVGA 700BR as replacement.
https://www.bestbuy.com/site/evga-700w-atx12v-eps12v-80-plus-bronze-power-supply-dc-dc-technology-black/6346160.p?skuId=6346160