Question about Dell Optiplex 755 Desktop Desktop Computer

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The OPTIPLEX 755 will not start

The OPTIPLEX 755 powers on for a few seconds and then turns off.

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  • Reginald Jackson May 11, 2010

    Could you please look at the 1-4 lights they will either light up green orange, they can be located in the front panel, but most are in the back of older dell systems. power up the system and see which ones light up and what color. If they die, then that might be a powersupply issue

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Open the case and look at the little black round things that look like soda cans. Those are called Capacitors. they are kinda like small batteries. They should have a shiny silver top. If they have anything oozing out or if they look like theyve popped like a popcorn kernel, then you have a faulty board. If your pc is under warranty, call dell asap. its an easy repair and its done the next day.

Posted on Jul 21, 2009

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1 Answer

Led indicator lights


Following are the various ways to clear the CMOS or NVRAM on Optiplex systems:-

The computer must be disconnected from the electrical outlet to clear the CMOS setting.
Remove the computer cover.
Locate the CMOS battery on the system board.
Note the orientation of the battery, usually the plus side is up, and remove it.
Wait for 3 to 5 minutes for the CMOS to clear.
Replace the battery in the socket.
Replace the computer cover.
Plug the system and devices back into the electrical outlets and turn them on.
And Sec option jumper setting also available you can used:-
Turn off the computer and disconnect the power cable from the electrical outlet.
Remove the computer cover.
Locate the 3-pin CMOS jumper (RTCRST) on the system board.
Remove the jumper plug from pins 1 and 2.
Place the jumper plug on pins 2 and 3 and wait approximately 5 seconds.
Replace the jumper plug on pins 1 and 2.
Close the computer cover.
And More Support see link:-
ftp://ftp.dell.com/Manuals/all-products/esuprt_desktop/esuprt_optiplex_desktop/optiplex-755_user's%20guide_en-us.pdf

If more Technical Support Call.

Aug 22, 2013 | Dell Optiplex 755 Desktop Desktop Computer...

2 Answers

Dell optiplex 755 no power


You can also have a faulty power supply. I've seen many dells meet their demise with junk power supplies. If you are able, and you have the time, try a different one inside of it. it will need to be about a 300 watt 24 pin ATX style power supply with a 4 or 8 pin CPU power plug. (depends fully on what the board calls for.)

Nov 29, 2012 | Dell Optiplex 755 Desktop Intel Celeron...

1 Answer

Will ATI Radeon x1900 run on my Dell Optiplex 755?


Looking at the specifications for the Optiplex 755 line I'm seeing the highest power supply is in the minitower version at 305W. I can't find a document specifying the power requirements for the Radeon x1900, but most benchmark power consumption tests show the system pulls around 280 - 300W with that card installed.
The problem is either your specific Optiplex 755 configuration can't support the power requirements, I don't know if you have the MiniTower, Desktop Tower, Small Form Factor or Ultra Small Form Factor version of the sytem or the card is itself is bad.

Jul 06, 2012 | Dell Optiplex 755 Desktop Intel Celeron...

2 Answers

HiI have a dell desktop and won't start. for a second the fan spin than the power button turn yellow. help


hi,
Does your desktop is making any beap sounds? Are you able to see the dell logo on the startup on the screen? Please do let me know these things.

Mar 08, 2012 | Dell OptiPlex GX280 PC Desktop

1 Answer

I have dell optiplex 755 desktop with lcd monitor.everything is all right but monitor starts for 2 seconds and then turns off help me to solve this problen


If is possible we need to establish if the monitor is defective or not. Please connect to a different monitor/LCD TVscreen or just unplug the monitors data cable from the back of the computer powered it up and check if is giving you a message on the screen as "No signal detected". It will tell you that the monitor is fine and is a problem with your Dell computer.

Jun 29, 2011 | Dell Optiplex 755 Desktop Desktop Computer...

1 Answer

Dell E521 blinks on and stays powered up but does not start start up sequence can't F12 or anything as it does not get that far


Just had similar problem with optiplex 755. Solved problem by resetting bios. Remove power cord. remove bios reset jumper. (check owners manual or dell website for the location) Dell says to remove for 5 seconds and replace to reset bios. I find this to be incorrect. I had to unplug cord remove jumper, plug cord in, restart, shut down, unplug cord replace jumper, reinsert power cord and restart. Had to change a few configs in bios based on computer configuration after restart. Hope it works for you. Seen same problem on optiplex 750 and 755 in last week.

Jan 21, 2010 | Dell Dimension E521 PC Desktop

8 Answers

Dell Optiplex 755 does not boot. The steady yellow light on the power switch comes ON but no other error codes on front panel. Machine powers up for few seconds with Yellow light and powers down then wait...


I work at a college and had this same error with a nice few of the Optiplex 755's. However it was due to the power supply failing, nothing with the mother board. Have you tried replacing the power supply?

Oct 15, 2009 | Dell Optiplex 755 Energy Smart Minitower ...

2 Answers

Optiplex 755 flashing orange power button light only


Sounds like you only have power going to your motherboard.

The power supply might be bad on it, that or maybe the power cord is going bad and is only letting a small amount go through. I don't see why there should be a problem if you have even a little bit of power going though.

Jul 11, 2009 | Dell Optiplex 755 Minitower Desktop...

1 Answer

Not able to find any drivers for Dell optiplex 755 for windows server 2003 OS


Welcome to FIXYA

there are a few websites i use might like to try them

drivers.com is a good one and driversupdate.org is also a good one

hope this halps you out ...have a good day:)

Jul 16, 2008 | Dell Optiplex 755 Ultra Small Form Factor...

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