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June 29th, 2020 18:00
Optiplex 990 SFF Beep noise
Hi I have searched the forums and cannot find any solution. I am getting a beep noise even though there is no power connected to my pc and the pc is off. The beep noise is constant and I cannot recognise the pattern as well. Please help
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bradthetechnut
9 Technologist
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June 29th, 2020 21:00
Replace the size 2032 CMOS battery if it hasn't been done in the last 5 yrs. A low battery can cause all sorts of bizarre problems. And of course, please post back as to how it goes.
luukechang
2 Posts
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July 1st, 2020 00:00
Thanks for a suggestion, however, do you have steps to replace the battery?
speedstep
11 Legend
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47K Posts
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July 1st, 2020 01:00
https://www.dell.com/support/home/en-us/product-support/product/optiplex-990/docs
https://downloads.dell.com/manuals/all-products/esuprt_desktop/esuprt_optiplex_desktop/optiplex-990_service%20manual2_en-us.pdf
You use a sharp plastic spudger to press in and lift the coin cell.
https://www.youtube.com/watch?v=RKKm_DfcMds
https://www.amazon.com/Duracell-Lithium-Battery-lasting-battery/dp/B00005T3DV/