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1 Rookie

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3 Posts

130

May 15th, 2024 15:14

Orange light flashing

My dell optiplex 9020 started flashing the orange light twice.
The pc starts ok but after a few minutes you hear a click noise and then goes off. It tries to turn on a few times but fails and then starts flashing the orange light twice. 
I changed the cmos battery. I managed to do a diagnostic test f5 and found nothing wrong. I also clean and replaced the thermal paste of the processor but still the same.I  checked the ram, replaced them or moved them. 
If you leave for a few hours and start it it will boot and no problem but after a few minutes or may be half an hour it will do it again. 

9 Legend

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12.3K Posts

May 15th, 2024 22:08

Try clear CMOs settings via motherboard jumper. If no change, could be a failing psu.  Try BIST of the psu.

(edited)

6 Professor

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8.4K Posts

May 16th, 2024 00:18

How to Run a Power Supply Unit Self Test On a Dell Desktop or All-in-One Computer

Redxps is spot on that it's probably the PSU and you changed the battery already.

Redxps also mentioned and here's the instructions:  How to Perform a BIOS or CMOS Reset and Clear the NVRAM on Dell Computers

1 Rookie

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3 Posts

May 16th, 2024 17:21

Thank you for your responses. 
I tried the psu self test and the led comes on as well as all three fans. So it looks like the psu is fine.
I also tried the cmos reset by changing the links on the mb. I  followed the instructions on the link you sent me. That didn't solve the problem. I noticed that when I repeat this process I can remove the flashing orange light and restart the computer straight away but it goes off again. The orange light flashes a few times and then back to flashing twice repeatedly. 
I will try next to reset the bios from f2 by following the instructions. This will be possible if it allows me enough time to change the bios settings. So 

6 Professor

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8.4K Posts

May 16th, 2024 21:22

A PSU on it's way out can still spin the fans when the test button is pushed.

From the Reference Guide to the Dell OptiPlex Diagnostic Indicators



Also, a steady amber blink can indicate a bad PSU.  Solid amber would mean bad motherboard or component.

1 Rookie

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3 Posts

June 12th, 2024 18:09

I have replaced the psu and the problem is gone.

Thanks to everyone 

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