Question about Dell OptiPlex 780 PC Desktop

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Optiplex 780 Diagnostic light 2, 3, 4 continuously Flashing

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Posted on Jan 02, 2017

  • 63 Answers

SOURCE: DC driver for Dell OptiPlex 780 Desktop Computer

Dell has all of their computer's drivers online, in their Support section. You will need to input the Service Tag of the computer to find the ones for you.

Posted on Jun 21, 2012

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Why is dell optiplex 780 lights 1 & 3 ok and power button amber?


An Amber blinking power button indicates a low voltage problem. This can be caused by a defective power supply or a defective motherboard.
Remove any PCI cards like modem, video card, sound card, etc... Remove the memory modules and disconnect cables to CD/DVD drives. Look at the USB ports to see if any are damaged.

Apr 28, 2014 | Dell OptiPlex 780 MT Desktop Computer...

1 Answer

Fan speed too high


Go to the BIOS and see if the settings have adjustable speeds for IDLE Fan.

Nov 11, 2013 | Dell OptiPlex 780 Desktop Computer 1 x...

1 Answer

Have optiplex 780, On start up the diagonistic


You could try unconnecting the USB hardware and then start the computer. But, with Dell you will most likely need to have the keyboard plugged in. Then if the computer starts, you can fit each item until it stops. But, the Dell USB controller is renowned for being weak. You may need a USB PCI card to continue using the computer, they are a lot cheaper than a replacement motherboard or a new computer.

Sep 05, 2013 | Dell OptiPlex 780 Desktop Computer 1 x...

1 Answer

Error codes


Go to Dell Support > Optiplex 780 Desktop PC > Manuals & Documentation > Dell Optiplex 780 Service Manual,

http://www.dell.com/support/troubleshooting/us/en/19/Product/optiplex-780

Diagnostics > Diagnostic Lights,

"Problem Description - A possible expansion card failure has occurred"

"Suggested Resolution -
1) Determine if a conflict exists by removing an expansion card (Not a graphics card) and restarting the computer.

2) If the problem persists, reinstall the card you removed, then remove a different card and restart the computer"

Be SURE to follow Anti-Static Procedures.

Regards,
joecoolvette

May 13, 2013 | Dell OptiPlex 780 PC Desktop

1 Answer

Is there an SD card slot on the Dell OPTIPLEX 780?


There is no card reader on most models of the Optiplex 780. There may be a card reader on the SFF unit. The MT, desktop and USFF do not include a card reader. You can add a 3.5" internal card reader to the MT or desktop models for under $20. You could use an external USB card reader with any Optiplex 780.

I hope this helps.

Cindy Wells

Apr 01, 2013 | Dell OptiPlex 780 MT Desktop Computer...

1 Answer

Dell optiplex 780 shutdown automaticaly


The desktop could be overheating and shutting down.
To fix this problem, please click on this link :-

Apr 14, 2011 | Dell OptiPlex 780 MT Desktop Computer...

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