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Optiplex 780 diagnostic lights 1 & 4 with solid amber power light
My Optiplex 780
- will not post
- will not beep
- will not output any video
When I push the power button,
- Diagnostic lights 1 & 4 flash
- Power button is of solid amber
When I turn the computer off:
- if I press the Power Supply test button, it illuminates green
If I disconnect the power cable
- A tiny LED on the circuit board (next to AUX PWR label) stays amber for a minute or two.
Diagnostic lights 1 & 4 are not documented in the Dell manual. I have tried to disconnect all peripherals, all drives, all cards, even all RAM, still no POST no beep, no video: just the fan running, and diagnostic lights flashing.
Any hope for this computer?
DELL-Hemalatha
2.8K Posts
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May 20th, 2016 23:00
Hi CHRISTOZOID
Thanks for writing to us.
Diagnostics led 1 & 4 indicate power connector faulty. Please reseat the PSU connector if not yet done.
If issue still the same, then consider replacing the PSU . Sometimes the PSU connector on the motherboard to be faulty.
Do let us know how it goes post reseating the PSU connector.
Regards
DELL-Hemalatha
2.8K Posts
1
May 21st, 2016 20:00
Hi we are awaiting your response.
mkuso
1 Message
0
July 21st, 2017 04:00
i have dell optiplex 780. i have a problem of solid amber light.I have cleaned ram,cleaned CMOS but problem continues how can i solve it?pc turns on,fans are working normally but no display on the monitor
speedstep
9 Legend
9 Legend
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47K Posts
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July 21st, 2017 07:00
Solid Amber Power Button is Bad Motherboard.
You did not say which SIZE you have.
The Optiplex 990 says this.
1 4 MBF (Motherboard Failure) is well documented.