Question about Dell OptiPlex GX280 PC Desktop

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Motherboard issues Computer starts up beeps and when is all said and done the A and B lights on the mother board are lite up orange C and D are green. Computer will not boot up. can anyone help me im having trouble finding this on the internet. thanks.

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Re: Motherboard issues


Posted on Dec 13, 2007

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The Dell user manual has the beep codes, which usually are in sequences with short pauses between. To figure out the problem one needs to know the spacing of the codes. Is it 1-2-3, or 2-2-2, or 3-1-2 or what? The first thing I would check is the RAM - make sure it is seated correctly, and try removing all but one stick.

Jun 24, 2014 | Dell OptiPlex GX620 PC Desktop

1 Answer

Desktop turns on , doesnt beep, black screen, with orange light in front. instead of green

So if I understand you correctly when you turn it on you get the oraange light on the front, the sound of the fans turning but no beep and no video output?

If this is correct then you likely have a POST problem (Power On Self Test), the beep you normally hear is conformation that the computer has passed the POST correctly - if you no longer have the POST beep then I suggest you look up your motherboard manual for more info but the basic check is to confirm all the cables and drives are well connected, the RAM is fully and correctly inserted. If you have recently added any new devices to your computer (graphics card or RAM etc) then remove this and see if the POST problem goes away. You may also find in your motherboard manual something labeled CMOS Clear - this will be a jumper (little pins sticking out) of the motherboard which is essentially a reset for the BIOS which may help rule out an issue in the BIOS config.

Good luck!

Nov 24, 2013 | HP Pavilion PC Desktops

1 Answer

Computer wont boot, the fans keep running

Does it come with any beep sound, because beep sound clarify the fault. Check it by the way.
The list is given below.

No Beeps Short, No power, Bad CPU/MB, Loose Peripherals
One Beep Everything is normal and Computer POSTed fine
Two Beeps POST/CMOS Error
One Long Beep, One Short Beep Motherboard Problem
One Long Beep, Two Short Beeps Video Problem
One Long Beep, Three Short Beeps Video Problem
Three Long Beeps Keyboard Error
Repeated Long Beeps Memory Error
Continuous Hi-Lo Beeps CPU Overheating

best of luck!

Mar 07, 2012 | Compaq Presario S4040SE - (refurbished)...

2 Answers

I recently moved my dell inspiron 530s desktop from the basement to the second floor and now everytime i plug in the computer to the outlet, the fans start and the an orange light lights up the power...

hi there:) do you hear any mother board error codes (beep,beeps or beeping) when you try to start the machine? you see a prompt to "enter setup" or anything else for that matter?

Jul 30, 2011 | Dell Inspiron 530 Desktop Computer

1 Answer

Desktop screen is blank even when the cpu and monitor indicator a

It looks like issue with either mother board or processor.
open the box and remove all memey and power it on. if it makes a beep sound, there is no issue with processor, else we suscpect processor. If it make beep sound, it might be mother board issue. And for checking monitor working condition, remove monitor data cable and see no cable connected messages comes in monitor or not

Oct 13, 2009 | Dell PC Desktops

2 Answers


Disconnect the Power cable / A/c adapter/Battery from computer.
Disconnect External peripherials.
Hold down the power button on the computer for 10 seconds.
Reconnect the power cable or A/c adapter and battery or the computer
Try to turn on the computer
check for Led's on the computer
If still no display ,shut down the computer,disconnect power cable.
Open the computer tower,remove memory modules,reconnect power cable and turn on the computer.If you get a beeping sound after turning on you should be getting beeping sound suggesting the mother board is not bad.Turn on the computer and disconnect power cable from computer.
Reseat 1 memory at a time if you have 2 memory module or if single memory module reseat in different memory slot,swap memory module.
Reconnect the power cable and turn on the computer if it boots to desktop possible issue with 1 of the memory module.
Disconnect the harddrive ide cable from the harddrive .Turn on the computer.
If still unable to power on .Shutdown the computer and disconnect power cable.Remove video card,sound card ,modem card if any .Connect just the vga cable from monitor to the integrated video port.
Connect power cable and turn on the computer.
If computer turns on possible issue with one of PCI or PCI express card.
If still unable to power on.Disconnect the power connector pin from the motherboard and reconnect it back.Turn on the computer check power power led on motherboard,also check if the processor fan is spinning. if no go then issue with motherboard. GOOD Luck.!!

Aug 27, 2009 | Insignia D400a PC Desktop

2 Answers

My comp wont boot up


Try reinstalling the OS, I hope this will resolve this issue.

Aug 02, 2009 | PC Desktops

1 Answer

Green light flashing on back of unit near power cord also green light flashing on motherboard near power supply plug in.

I would suggest trying to replace the power supply. If that does not fix the issue, i would need to hear more about the computer.

May 06, 2009 | Sony VAIO VGC-RB40 PC Desktop

1 Answer

Orange light, no start

Well it could be the power supply, but, first try removing all the cards on the motherboard except the video card (remove and reseat that) assuming the video is no built in. Then turn it on. See what happens. Post back with results

Apr 04, 2009 | HP Pavilion 520w PC Desktop

1 Answer

Not the power supply!


To help troubleshoot a problem, Dell Dimension 5100 has four diagnostic lights labeled "1," "2," "3," "4" on the front panel. When the computer starts normally, the lights flash. After the computer starts, all four lights lites solid green. The power button also lites solid green. If the computer malfunctions, the color and sequence of the diagnostic lights as well as the power button helps identifies the problem.

First, disconnect the power cord and remove all connections (Keyboard, Network, Mouse etc) as well as optional PCI Cards. Connect up the power cord (Monitor as well) and try powering the PC.
Check the diagnostic lights/system lights color and sequence and check the link below for more info (Assuming you have another system that can access internet)
Diagnostic Lights -
System Lights -

Reply with lights color and sequence as well as any beep codes and I will respond at best effort.


May 05, 2008 | Dell Dimension 5100 (D51L1) PC Desktop

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