20 Most Recent Dell OptiPlex 755 Motherboard System Board Socket 775 DR845 Questions & Answers

Hello Asam,

Please check the connection of front panel led on the motherboard. If the connections are ok then the front panel led gets fused.

Dell OptiPlex... | Answered on Jul 08, 2011

I don't know if you have done anything lately,ie; updates to board, cahnge of cables, etc. but first, try shutting down system, unplug your cable for video, unplug tour tower, plug tower back in and restart. If this doesn't work. You may want to try a system restore back to when you had a picture. Try this and let me know if this worked by adding comment or reply at the end of solution.

Dell OptiPlex... | Answered on Mar 13, 2011

Hi Friend, Dell Optiplex has the PCI express video card slot

Dell OptiPlex... | Answered on Dec 08, 2010

Hi Good day!!! try to check your RAM (memory) turn off PC remove the memory and then clean it using a brush after that put it back and be sure to lock it. now try to turn on your PC and see if it works.

thank you for using FixYa

Dell OptiPlex... | Answered on Nov 23, 2010

1. check the video card or the cable connecting the monitor to the video card..
2. or if your computer has a built in video, check the computer's RAM.
also might be bad memory stick hopr this helps

Dell OptiPlex... | Answered on Oct 28, 2010


Once you replaced the CMOS battery, it is important to configure the BIOS settings.

-Start your PC. (Before the Operating system press F2 or the key to enter your BIOS. (The key may be the Del button)
-Enter the BIOS.
-Modify the Date.
-Verify if the parameters are correct. Check the information on the hardware installed in the computer (such as the number of tracks or sectors on each hard drive) are stored in the CMOS. You must select the HD and save it in the BIOS.
Check the HD type. You may use auto detect function of BIOS.
-Save and quit BIOS.

Waiting your comments.

Dell OptiPlex... | Answered on May 30, 2010

the power light is blinking blue, the computer is in standby mode. Press
a key on the keyboard, move the mouse, or press the power button to
resume normal operation

Dell Computers &... | Answered Yesterday

Disconnect the cmos battery and any power supply connected to unit - wait a few minutes and also push and hold the on button. Then after a few more, put back the battery and the cleared cmos should allow you in without a password.

Dell Computers &... | Answered 2 days ago

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