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Computer only briefly spins PU fan then nothing.

Trying to fix friends desktop. The specifics on CPU: MB=K7S5A ver. 3.1. Install components: 2 sticks of PC 133 Ram consisting each of 256 MB of Ram. AMD Duron Processor, and Rage Pro Video Card. Thats it. I plugs up the pwr supply, press the pwr button and all I can get is 5 seconds of the CPU fan 2 spin and then nothing. I am baffeled. Can anywon help?

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Reset your bios put the cmos cell for 15 minutes then refix it.
also check RAM.

Posted on Nov 01, 2008

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When i turn on my pc all seems well for about 5 secs then the heatsync fan and the tower fan stop moving and at that point my video card fan starts spinning 5 times faster what would cause this


Following are the reasons for overheating, just take care of these things::


1. Stop Overclocking your CPU
2. Make sure your Heat Sink is placed properly above the processor
3. Clean the Processor fan, Heat Sink and other peripherals
4. Use High Speed fans
5. Use CPU Heat Sink Paste in the processor
6. Make sure your dint restrict the speed of CPU fan.
7. Use Additional Cooling Units


If such problems occurs due to internal errors then i would suggest to perform a full computer scan with pc optimization tool like PCFresher for an instant fix.

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Installing new motherboard, processor, mem, and video adapter. Powers on but no post.


If the beep is a very high pitched tone, turn off the computer. Your CPU is overheating. The thermal paste may not be spread correctly on the CPU or the heat sink isn't properly installed.

Otherwise, it's probably a memory error. This machine takes 2 GB of memory as 2 single GB memory sticks. Try booting the machine with only one DIMM installed. Try each stick individually before getting replacement memory.

I hope this helps.

Cindy Wells

Jan 27, 2013 | HP Compaq Presario SR1215CL (82916052980)...

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I made some mods/upgrades for Gateway 835 GM (Started with RAM -2GB Sticks- , Video Cards, & Finally CPU because of the sudden not wanting to display anything on my screen! PLEASE READ & REVIE


Here is what I would do, depending on your board go to what the brand is and download the BIOS again flash it if you do not see the BIOS at the startup. If you do see the BIOS then you will need to install the drivers for these components you replaced. Depending on which operating system you are using. Win XP you will have to load drivers from the driver disks that came with the product replacement or search for one online. If you have Win 7 it should pick the drivers up through Windows Updates load them without them or a running BIOS your shot in the dark. Your computer has to have a BIOS and drivers to run the hardware you replaced. Just because you had them before does not mean it will operate. correctly. Make sure your components are the correct ones for your machine. Just because ram fits does not mean it is the correct ram. So get BIOS up again from there boot from C: reload Windows then re install the whole operating system and be sure to load drivers and updates. That is how I would proceed with this issue. John

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1 Answer

Cpu not heating, ite chip getting very hot ,no display


If the fan on top of CPU is dirty, dusty, damaged or not connected properly,it could cause CPU to overheat. The Computer should switch off automatically to prevent damage to CPU (they can burn out very quickly if not cooled properly!!!)

1. Is the fan connected properly to motherboard?
Check cable running from fan
2. Is fan dirty or dusty?
Use a small brush or can of compressed air to remove dust off fan. Never use a normal household vacumn cleaner-this can create a static electric discharge which could damage components.
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Replace fan with similar make and model

Hope this helps. Thanks for using Fixya

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When i turn the power on, 3 beeps play, the fan runs and the power light comes on, but nothing else


Hearing ONE beep is normal, and a signal that the computer hardware is OK.

Hearing THREE beeps is a signal that something is wrong:
* burnt-out CPU,
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* one of the RAM chips is defective
* the video-card is not working

If there is more than one RAM stick, remove all but one stick, and start it up, to see if it starts.

Check that the fans are spinning freely.

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HP Desktop goes into a quick black screen then comes back frozen?


If you did mention the measures you've already taken, i can narrow down the troubleshooting tips. Anyway, please follow the steps below (if you haven't done).
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  2. Clean the heat sink and apply some more coolant paste.
  3. Boot into Safe Mode and check if the problem still persists or not.
Do let me know how far you've done and the results of the above three measures.
Good luck.
Thanks for using FixYa.

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Make sure the cpu fan is plugged in and to the cpu fan connector on the motherboard.

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Carpencote, Fedarcyks is back, and ready to try again.....


Do not just check conductivity as some fans are speed controlled and you may have a sensor problem. see this wikipedia entry explaining various modern speed detection methods: http://en.wikipedia.org/wiki/Computer_fan#Physical_characteristics

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Carpenocte, Fedarcyks is back; we were disconnected last week; have tried new things....


well, if the powersupply whent, then everything is gone and you may need another fan. tis' the way of the powersupply. just try gettin g a new fan! now, does the computer start to boot when you try to turn it on with the fan not working? if it does, then that's good. if it doesn't, then try replacing the power switches in the case(or checking them first at least). hope that helps!

May 14, 2008 | Dell Dimension 4600 PC Desktop

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