Dell optiplex 790 error light 2

Question

I was trying to switch out the RAM and when i tried to boot up the pc , a amber light was on the power up a botton, there was also a #2 flashing. I have tried every soluiton and none of them have worked.ifyou know anything please comment on this or contact me by email.

Thanks

redxps630 · Answer

Problem Description Possible peripheral card or system board failure hasoccurred.Troubleshooting StepsRemove all peripheral cards from the PCI and PCI-E slots and re-start the computer. If the computer boots,add the peripheral cards back one by one until you find the bad one. Do you hear any beep codes since you were adjusting the ram?  the diagnostic light is just a guide.  In the end if system does not POST, remove all cards and all ram, put only one ram back in DIMM1, disconnect hdd etc, test again. p.68/94 https://downloads.dell.com/manuals/all-products/esuprt_desktop/esuprt_optiplex_desktop/optiplex-790_owner%27s%20manual_en-us.pdf

bradthetechnut · Answer

Dell Diagnostic Indicators For reference, the 790 goes back to 2011.

Replace size 2032 CMOS battery if it hasn't been done within the last 5 years.

Possible peripheral card or system board failure has occurred.

Remove all peripheral cards from the PCI and PCI-E slots and restart the computer. If the computer boots, add the peripheral cards back one by one until you find the bad one.

bradthetechnut · Answer

Hi @redxps630,

You may have noticed you pasted nearly the exact same thing l did in your 1st pgh.

Please keep in mind owner's manuals and service manuals are size specific and don't necessarily match up, notably when it comes to page numbers. Diagnostics will still be the same though. BTW, I didn't catch on to that right away either.

In the DT manual, the diagnostic quote you found is on pg. 73, so on and so forth.

redxps630 · Answer

must have been replying at same time.

Optiplex Desktops

Dell optiplex 790 error light 2

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