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

Download from dell's website. You need the service tag number that is on the PC case, else the model series.

Dell... | Answered on Aug 08, 2016

The stock 305W power supply guarantees 20 to 25W on the +5VSB rails and 150 to 170W on the 3.3v/5V Rails. Many GTX 750 TI now say (300W PSU that can supply 18 AMPS MIN on the 12v rail aka 216W on the 12v rail.

Many EPS 12v power supplies only guarantee 10 to 15W on the +5VSB and 125 to 130W on the 3.3v Rails.

This means you buy the supply and it may not even turn on. If it does it wont work with the 960 card installed.

Buying a power supply is not a single 12v rail and thats the only thing it uses.

There are many users who should have gotten a corsair RM1000 but instead chose an ATX not EPS 12v power supply at 500 to 750W and they have the Solid Amber Light of *****. EPS12v 2.92 for 750W and up guarantees 150W on the 3.3v rail, 20W on the +5vsb rail and 375W on the 12v Rails minimum.
CORSAIR RM Series RM1000 1000W ATX12V v2 4 and EPS 2 92 80 PLUS GOLD...

Dell... | Answered on Mar 24, 2016

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