My Dimesion 8400's fan is so loud that it is about as noisy as a *** cleaner. It blows papers off my desk. The computer doesn't boot up, though. I have opened the case and cleaned everything, vacuumed out all the dust, taken out and reinstalled all the parts I can, replaced the battery, and still no luck. Any help would be greatly appreciated.
My Dimesion 8400's fan is so loud that it is about as noisy as a *** cleaner. It blows papers off my desk. The computer doesn't boot up, though. I have opened the case and cleaned everything, vacuumed out all the dust, taken out and reinstalled all the parts I can, replaced the battery, and still no luck. Any help would be greatly appreciated.
Damascus2
Is the power switch LED, solid green, blinking green, solid amber, blinking amber?
Check the sequence of the diagnostic lights on the back panel of the case, see Here:
ftp.dell.com/.../dimension-8400_Owner%27s%20Manual_en-us.pdf
Are there any 'Beeps', or error messages?
While the case is open, you check the motherboard for any capacitors with bulging tops or are leaking, the tops should be perfectly flat.
Bev.
Airplane mode indicates bad capacitors on the motherboard and or inside the power supply.
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No beeps. Capacitors all look good. None of the four diagnostic lights are on. Power switch light is solid and appears to be green, although it might be amber. I am color blind and it's a small light.
No beeps. Capacitors all look good. None of the four diagnostic lights are on. Power switch light is solid and appears to be green, although it might be amber. I am color blind and it's a small light.
I'm not sure what you meant by jump the wire, but I did disconnect everything except the power supply and the diagnostic lights still don't come on and the fan still blasts. I guess it's time for a new computer. Thank you very much for your help and I'm off to the store.
Optiplex GX620 or better Mini Tower units are good crossover replacement systems.
https://www.walmart.com/reviews/product/22985035
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The forum is primarily user to user, with Dell employees moderating
Contact USA Technical Support
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I'm not sure what you meant by jump the wire, but I did disconnect everything except the power supply and the diagnostic lights still don't come on and the fan still blasts. I guess it's time for a new computer. Thank you very much for your help and I'm off to the store.
Damascus2
Good luck at the computer store, have fun shopping.
You can read this document about 'jumping the wire' to test a power supply:
http://aphnetworks.com/tutorials/psu_paperclip_trick
Bev.
Perhaps the original poster has already bought a new computer by now, but the issue is probably the one described in the following post:
htt p://binglongx. com/2010/12/12/dell-dimension-8400-boot-problem/ (take out the spaces and copy paste to browser)
Certainly I was affected by this issue with my 8400, and you can see from the comments on that article, many others were also affected.
What happens with some 8400s after a long time is that "Prescott CPU produces so much heat, over the years it comes to the point that a slight push from the distorted green fan shroud, combined with an aged heatsink locking mechnism under heat (that’s why some people argue using a screw-based instead of lock-based heatsink), creates (intermittent) loose connection between CPU and heatsink and/or between CPU and motherboard" and so the PC thinks there is no CPU installed.
I got around this issue for about a year by just physically pressing down on the heatsink / shroud when I turned on my 8400. This made the PC 'realise' there was actually a CPU there. For a more elegant solution, the person who wrote the info in the link above, suggests an arrangement with elastic bands.
Thanks for the interesting post. I have indeed bought a new computer and am very satisfied with 10 years of service from the Dimension. It's just time.