20 Most Recent Dell Optiplex 755 Minitower Desktop Computer Questions & Answers

what model is this small form factor ? mini tower?anyhow, here are the things that you may consider .
if its a small form factor unit then you may need to get a video card that is Low Profile
and also consider the power supply :
The ATI Radeon HD 4650 512MB Low Profile PCIe x16 graphics card should work fine with the 275w PSU.
Max power draw is 48 watts

Dell Optiplex... | Answered on Oct 13, 2015

A Blinking Amber or Yellow power button means that the power supply is receiving power from the source but is unable to properly distribute it to the components. This can be caused by a defective power supply or a defective motherboard. Just to make sure that nothing else is causing the problem, 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.

Dell Optiplex... | Answered on Mar 23, 2014

could also be a ram stick that ate it. Also some of the older mother boards dont have a 12 volt supply that new cpu chips need might check that as well. Make sure the power supply is turning as well as cpu

Dell Optiplex... | Answered on Nov 12, 2013

check your keyboard,maybe you have a sticky key and if the keyboard is okay,try changing the memory card.
good luck

Dell Optiplex... | Answered on Nov 12, 2013

New mother board. The power section of that board probably has some capacitors that look swollen or leaking a brown substance.

Dell Optiplex... | Answered on Oct 22, 2013

Hi juan...
You do not have Bluetooth on the Dell OptiPlex 755, but you can buy a "Bluetooth Dongle" very cheaply from the internet.
It is a plug and play you insert into the usb port and then you have Bluetooth.
Go to the following webpage to see a Bluetooth dongle

Dell Optiplex... | Answered on Oct 09, 2013


Dell Optiplex... | Answered on Jul 19, 2013

Sounds like the power supply is not completely stopping the power after shutdown, Replace the PSU and it should fix the problem. If your problem is still existent then it may very well be the power switch itself. Replace if possible. I Hope this helps.

Dell Optiplex... | Answered on Feb 07, 2013

If the hard drive was replaced or reformatted, the factory restore was erased. If so the only way is to load OS from CD .

Dell Optiplex... | Answered on Jan 30, 2013

PSU = power supply unit

Dell Optiplex... | Answered on Dec 23, 2012

Sounds demanding. I would like this solution sounds better. Capish?


Bad Power Supply -> Replace

(Also FOLLOW Anti-Static Precautions, and to include clean out the inside of the computer)


Dell Optiplex... | Answered on Aug 28, 2012

Not finding what you are looking for?
Dell Optiplex 755 Minitower Desktop Computer  Logo

40 questions posted

Ask a Question

Usually answered in minutes!

Top Dell Computers & Internet Experts


Level 3 Expert

13434 Answers

Thomas F. Schneider

Level 3 Expert

2715 Answers

Brad Brown

Level 3 Expert

18165 Answers

Are you a Dell Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

View Most Popular

OptiPlex Dell

  • OptiPlex Dell

Most Popular Question

factory resotore dell opitiplex 755

  • Computers & Internet