Question about Dell (8N816) Motherboard

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I have a dell optiplex GX298 that I am trying to fix but i do not have any manual. the problem is that I cannot identify the fan speed and sensor pins for the cpu fan, hense i keep getting the pu fan failure message when i boot. the oriinal fan died and i am converting one to it.

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You should try to find a fan that is compatible with the motherboard. if you try to "make one fit" you could end up burning up the CPU

Posted on Feb 07, 2009

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Dell Optiplex GX280. When working with home videos and when working on the internet fan seeds up. After opening a web page fan slows down. When I click a link or the next button fan runs fast again then...


either your computer is changing the fan speed depending on the temperature and has been doing this since you got it, then it's normal
but, if this is a recent change, then the fan is possibly getting ready to fail and should be replaced before it does.

Jul 05, 2011 | Dell Optiplex GX280 (99301) Motherboard

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I have dell optiplex gx280 computer.i am facing problem of CPU high fan speed when i turn on the PC.it goes to full noise like a jet fighter and nothing get appeared on the screen and fan continuously gone...


dells usually go full blast on power up then slow down to normal,sounds like fan is not responding to slow down signal i would try replacing fan, its got to be a dell fan

Jan 08, 2011 | Dell Optiplex GX280 (99301) Motherboard

1 Answer

My Dell Optiplex gx280 desktop error. It show only red light near the power button and nothing on the screen


Hi,
It sound like bad capacitors on the board. If you remove the top cover and then look under the DVD try to identify bad capacitors.
Ill attach a picture of bad capacitors for you, they are pretty easy to identify (the pop up or leak fluid)


jooonte_1.jpg

If it is bad capacitors you could try to buy new ones and solder them back, but thats a totally different story.

Good luck!

Dec 24, 2010 | Dell Optiplex GX280 (99301) Motherboard

2 Answers

I have dell optiplex GX280 System in unbranded casing, Kindly suggestion about Processor Fan Voice, he is so shouting


The fan(which runs on a bearing) has aged, it must be replaced. Luckily this is an easy and cheap fix. Pick one
http://bit.ly/9qzXBz

May 30, 2010 | Dell Optiplex GX280 (99301) Motherboard

1 Answer

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

2 Answers

Over heating


No thermal grease or old dry thermal grease and a dust and debris filled heatsink is your most likely cause of this problem. Dell isn't very overclocker friendly...it is more likely a lack of maintenance in blowing the dust out of the case on a regular basis. Take the case panels off and use dry compressed air to blow the system out and clean it thoroughly. The heatsink needs to be removed and the hold down latch on the processor needs to be removed and the heatsink and processor need to be wiped clean and a new thin layer of thermal grease applied to the processor. Put the system back together and fire it up.

Sep 27, 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

Jul 30, 2009 | Dell Computers & Internet

2 Answers

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


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.

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

3 Answers

GX280 - is it the motherboard?


Go here and download this program.

http://www.download.com/SpeedFan/3000-2094_4-10067444.html

This program will control your fan speed based on your cpu temp. It's main use is to quiet fan noise.

Dec 15, 2008 | Dell Optiplex GX280 (99301) Motherboard

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