Question about Dell OptiPlex GX280 PC Desktop

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Dell Optiplex GX280 boot problem

I have a Dell Optiplex GX280 that is having startup issues. It appearsto be a thermal issue as the fan comes on mostly at full speed and make a whirling sound on switching and does not boot.

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  • Anonymous Dec 26, 2008

    hey , i have exactly the same problem. The first time it happened i turned it off, and when i turned it on again it worked fine. Turned it off and the next day it did the same thing. Only each time i turn it of i have to try to turn it on more times untill it actually works. So the system isnt completely fried. There is something stopping it from booting and its getting more and more damaged. Dunno what it is. Ive replaced the cmos battery. Any solutions?

  • Phizwiz Mar 24, 2009

    My Gateway GM5088 has been flaky on booting up after being turned off. After about 15 months of use, it stopped rebooting on first try, then it took many attempts and NEVER rebooted when Microsoft downloaded an update that required a software reboot. Last week, after the computer was off for two weeks, it would not start at all.

    In the past, when startup failed, the main system fan would not spin. Now, if I turn the system on, the main system fan runs continuously at high speed. In either case, the boot fails without recognizing the monitor, the keyboard, or the mouse. The startup test seems to spin both optical drives, and I believe the hard drive spins, too.

    Most of what I've seen on various sites on the Internet suggest the problem is not all that rare. Blame is usually placed on the motherboard or the power supply, but some people who replaced both have had no success in fixing the problem. The CMOS data corruption, and perhaps the small lithium clock/cmos/bios battery are also possibilities. Is a puzzlement...

  • shsanie Apr 02, 2009

    my dell gx 300 after booting fan speed too high and loos the display



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I just repaired two Gateway systems with similar behavior (turn on power, fan runs at full speed, no boot), and both needed replacement system boards. (These were a different model, but the symptoms are typical of a dead system board.) I got the boards from a company called Blue Raven Technology (

Before deciding the main board is bad, try another power supply to make sure that's not the problem. Also you might try clearing the CMOS memory on the system board (either by moving a jumper usually found near the backup battery, or by removing the battery itself). Sometimes corrupted CMOS data will keep the system from booting.

Posted on Nov 16, 2008

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"system battery low" How hard is the battery to replace and cost that we may be looking at

Posted on Mar 11, 2010

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You just have to change the cmos battrey if not check if it is a problem with the battrey voltage to

Posted on Dec 24, 2008

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HI If your sysem completes the start up and runs normally then obviously nothing is wrong! Some PC's always startwith the fan on high speed, a little like auto-chooke on a car

Posted on Feb 13, 2009

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1 Answer

I have a dell gx280 model it does not boot and when switch on the fan makes a lot of noise.what can be the cause?

Sounds like a classic case of overheating. Check the thermal compound under the heatsinks and replace it with Arctic silver 5

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May be a cpu problem. Make sure the fan is on the cpu and that it is running. If the fan is running you may need to change the thermal compound that is between the cpu and heat sink. If that doesn't work , the next step would be to try to use another cpu that you know is good and see if it fixes your problem.

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open it ...remove the bios battery and after that put it back ..this will reset it ...and will boot ...just set the time and date and press f10 to exit and save ...
if it still fail to boot after that it has another issue ..probably a cpu fan or a ram memory

Jan 18, 2010 | Dell OptiPlex GX280 PC Desktop

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Optiplex gx280 won't boot and cpu fan goes faster

Sounds like a bad motherboard, I try resetting the bios , removing everything but the video , could be a bad power supply too (if you have one jump the wires in there as a test). you can buy those dell MBs cheap on fleabay.

I’m happy to help further over the phone at

Jul 30, 2009 | Dell Computers & Internet

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Dell Optiplex GX280 - On power ON , no Fan movement no display

Confirm no leaking or bulging capacitors on your mothboard.
refer to here

As this was a common problem with the GX280.
If found, you will need to replace the capacitors.

The other check is to make sure the heatsink is fitted correctly, perhaps reaply the thermal paste if you have any. I know that high temps would switch the GX280 off.

Jul 15, 2009 | Dell Optiplex GX280 (99301) Motherboard

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Dell optiplex gx280 makes loud fan sound at startup and enters windows screen, but will not finish booting and freezes up.

You may have a problem with your power supply(the loud fan noise) and eventually it may get too hot and will cause problems like not fully booting.

Jun 12, 2009 | Dell OptiPlex GX280 PC Desktop

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Checkpoint [ithr]

the problem description is
Smm mode is initializing the thermal probes.

problably the system is running at high temperature because of improper fan speed, so try to clear the nvram if its not working flash the bios if still the issue persists, replace the heatsink assembly and the motherbord.

Apr 02, 2009 | Dell OptiPlex GX280 PC Desktop

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Dell Optiplex gx280 shuts down and orange power light blinks

It happens because the power supply is overheats and computer goes to standby. The power supply is 160w or lower. Specially it will happen if you put more devices in such as video card or sound card. So the only solution you have is to place a small 1or2 fans toward the power supply to make it cooler. And 1 more thing the power for the fans should come from other sources.

Sep 30, 2008 | Dell OptiPlex GX280 PC Desktop

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