Question about Dell Optiplex GX280 (99301) Motherboard

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Dell Optiplex GX280 won't start. Fan sounds like a Boeing 757

This computer was purchased on a military auction and it was working fine for about 2 months. Now it stopped from booting at all, and the fan, won turned on, sounds like a Boeing 757 jet.

I read in different posts and forms that caps are bad (I looked at some and they have a brown, dried up goo on top), so it must be true. How can I tell the type of motherboard I need to purchase to replace this?

It looks like (as seen on some pictures that matches mine) that is a Dell Optiplex GX280 SMT Motherboard

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  • Anonymous Dec 22, 2008

    SFF Dell GX280 has a proprietary motherboard because of it's one screw and its grounding points/blades.

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  • 144 Answers

If the processor is ok, you can just change the motherboard. Then look for a compatible motherboard that can accept your processor.

Posted on Nov 28, 2008

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1 Answer

My optiplex gx280 desktop fan rotate at a really high speed, but won't turn on. There are no visible bad caps. What else should i check for?


I have that same problem and what usually works for me is to remove the ram and reinstall it also to move a little the heatsink of the processor, just nudge it a little then try again.
Also try not to move too much your computer

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OptiPlex GX280 PC Desktop only start de fans tun


I have had this problem and never quite got to the bottom of it. Because it doesn't get too far when in starts I think it is memory related or bios. Opening and closing the case can reset the bios on some computers so check this setting in bios, to stop it happening try turning of sleep or standby function in bios.

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I have a dell optiplex gx280 which seems to have a racing fan problem. sounds pretty loud, and varies. any ideas?


The fan bearings may be going bad. Variable speeds are normal as the fan adjusts to the cooling requirements.

Oct 24, 2009 | Dell Optiplex GX280 (99301) Motherboard

1 Answer

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.
Eric

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Confirm no leaking or bulging capacitors on your mothboard.
refer to here
http://en.wikipedia.org/wiki/Capacitor_plague

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.

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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.

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Check for updated drivers and install if available. If that does not resolve the issue completely remove the card and any software and drivers and do a clean install with the new drivers

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Same problem... orange power light, fan starts slow and builds up to very high speed.
I removed my video card and SIMMs --> it beeped on boot and the fan did not speed up.
Put one SIMM back in --> booted fine, pressed F2 to view BIOS. Memory reported fine.
Put all SIMMs back in --> all fine now.

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