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Cpu and power supply fans running, holding on button cpu fan stops a few seconds later. power suppy voltage 4.8 and 11. ?????

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  • E-Machines Master
  • 27,725 Answers

Test your PSU or replace it

One bad lead can cause a computer lots of problems

Test all leads that attach to your hard drive including electrical extensions,IDE,SATA and

the leads from your motherboard to your hard drive make sure they have a secure connection and are not faulty or just replace them there probably old and faulty

hope this helps

Posted on Oct 02, 2010

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Posted on Jan 02, 2017

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Pressing power button results in power light and hard disk light coming on for a couple of seconds cpu fan spins for same length of time then fan stops lights go off few seconds later lights come back fan...


it seems that you have damage memory card replacing may fix a problem but its better for it that you bring it to a technician in order to check much better because the motehrboard may possible be the problem.

Jun 30, 2011 | Acer Aspire 4315 Notebook

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HP P4SD, its running good with 4 gb RAM, P4 3.0ghz, and a couple sata hd. The problem is the fan output voltage, i havent been able to read the output chassis and cpu cooler pins voltage cause i can find...


"i can find my dmm?" did you mean CAN'T?
"its clearly off", what is off?
the fans are 3 pins,2 are power, one is RPM tachometer.
"it all works fine", so you can boot and run any OS, ?

"the voltage reads +12vdc", where, at fan or PSU?
the fans run off 12vdc, they are DC motors (from outside fan)
if the fan runs slow at 12vdc the the fan is bad or is a low RPM
fan, as some are, bigger fans run slow, for less noise.!

first is the CPU fan it must run full speed, if not the CPU will overheat in seconds and ALL CPU shut them selves (by there selves) this way. so CPU fan is first. what does it do... there....?

then BIOS screens. GOT BIOS UP? and running? with, ESC key pressed>.
let me guess your symptoms
1: PC dead. will not boot.
2: BIOS dead.
3: all fans DEAD,.
4: power switch works and all PSU voltages read right, (seems not)/?
5: if the PSU power wire reads right(DMM), matching the side sticker voltages, and the CPU is dead, the MOBO is dead, or CPU is toasted.


here is a modern PSU, sticker.
see 5 to 10 power lines, see them. all must read correctly
if a fan is dead, then its dead if 12vdc is present on the fan power pins.




psu-dsqaqngzuibs2svxh2bga4t0-2-0.jpg

Apr 28, 2017 | HP Asus Motherboard P4SD-LA Socket 478...

1 Answer

When powered on unit only beeps. continuous beeping- approx 1 every two seconds. nothing boots up at all, only beeps! Tried removing memory thinking it may be a memory issue but that was not the issue!...


Hi

If you have a Gigabyte MoBo then the CPU fan has stopped running.
Open the casing side cover and see if the CPU cooling fan is running or not.
If it does not run, the go into BIOS and disable "HDD S.M.A.R.T. Capability" in Advanced Bios Features
also set "CPU smart fan control" to disable in PC Health Status
OR
This may be a power supply problem.
The voltages of the power supply are going out of limits.
change the power supply and see.

May 20, 2011 | HP Pavilion Media Center a1510n PC...

2 Answers

When i plugged power cable to my pc cpu fan start without press power button


It should start for a few seconds, the fans should spin and then stop. You should be able to power it up as per normal. If that is no the case then you are having hardware issues which could be the Power supply

Apr 03, 2011 | Intel 845GE Motherboard

2 Answers

It was just this morning when I tried to turn my pc on.. unfortunately it did not. ! when i press the power button on cpu it turns on for a few second like one or two but immediately after it drops the...


Try replacing the power supply - I had a similar problem that was fixed that way. If that doesn't work, it's probably the motherboard itself. The CPU is also possible - have you overclocked it or otherwise cooked it? Is the CPU cooler/fan blocked with fluff, or has the fan been slow (or stopped) - noisy fan is a sign of bearing stiffness/partial seizure which slows the fan and lets the CPU get too hot. If the CPU is fried, you get the symptoms you describe (MB won't start the PS)

Dec 23, 2010 | ASUS M2N-MX Motherboard

1 Answer

Power supply Ok.But CPU fans started with seconds It's stop.


sounds to me like your mainboard is bad, i bet if you closely inspect the capacitors around the cpu one or more is bulged out or leaking

Feb 15, 2009 | Asrock P4S61 Motherboard

1 Answer

Cpu get stop after few second & no display at all


sounds like mite not have enough power supply how much power supply do you have 300 watt 450 watt ? if there isn't enough power it will shut cpu off , email me lala linda

Jun 02, 2008 | Mercury P4VM800M7 Motherboard

1 Answer

Power of


This happens because your CPU is overheating, open your PC and blow any dust off the openings and CPU/Power supply fans, if you think one of the fans is not working... replace it.

Jan 24, 2008 | Computers & Internet

2 Answers

Cpu fan starts then stops


Replace it and let us know if it still happens with the new one.It shut down because of overheating, I hope it didnt mess up your CPU.

Jan 06, 2008 | Biostar GEFORCE 6100-M9 Motherboard

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