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Cpu fan run but no booting or any disply - Computers & Internet

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First test your CPU then tast all leads that are attached to your hard drive sounds like a faulty lead of some sorts then
try replacing all the leads that attach to your hard drive including electrical extensions + IDE,SATA and the ones that attach from your motherboard to hard drive or
replace them they are probably old and faulty ?
good luck

Posted on Sep 03, 2010

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Posted on Jan 02, 2017

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My cpu is front light on but not go to disply powr fan is ok runing but not show the disply plz help me any on


check the display monitor cord to CPU if attached perfectly/check on off switch of display screen

Feb 23, 2015 | Computers & Internet

1 Answer

Does not boot, no beep, no display, fans running on high speed


Try blowing the dust out of the inside, around the vents, around the fans and by the cpu and heat sink.

Also remove the fan as it sits on the cpu and heat sink. Then remove the heat sink that sits on the cpu, then remove the cpu by releasing the latch on the side of the bay it sits in (remember how the cpu goes back into the bay). Now clean off the old dried up thermal paste on top of the cpu and on the heat sink that sits on the cpu. Put the cpu back into the bay and secure the latch. Apply a fresh coat of Thermal Paste to the CPU and Heat Sink. Put everything back together then reboot.

If the thermal paste has dried or is too thin to keep the unit cool it's like metal touching metal and shorts out the system so it can't boot.

May 31, 2012 | Computers & Internet

1 Answer

Won't start but CPU fan vibrates but will not go full blast. Intermittant


It appears you have a faulty CPU fan and it is causing the CPU to overheat and shut down.
I suggest you replace the CPU fan. remove any dust from the heatsink and put new heatsink compound on the CPU/heatsink.

May 06, 2012 | Compaq Presario S5000NX PC Desktop

1 Answer

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

Ok. I have a 8S661X-RH and there is no boot ! HD is ok , memory is OK and there is no SYS fan instaled ,Can you help me?


windows is not booting high Temp.
problem with Cpu fan chaque proccessor fan it running or not. if it running refix the cpu fan . Clene & peste apply on it . it Reduce the temparatur of machine window Able to start booting, if Same issue than replace the cpu Fan,

Jan 24, 2010 | HP Compaq Motherboard

1 Answer

My sony vgc-rb40 will not boot bios with cpu fan connected


mostly all fans are 12V DC try connecting all the fans directly to SMPS of the system i.e the red and the black wire

Sep 16, 2009 | Sony VAIO VGC-RB40 PC Desktop

2 Answers

Not booting but RAM,processor,SMPS ,HD are fine.


Check without Video Card, Processor , Memory and beeps are coming

If no then this is motherboar issue, I had the similar problem. So went to the local repair shop and got the power capacitors replaced,

Jan 29, 2009 | Asrock P4i65GV Motherboard

1 Answer

Will not boot


plug the cpu fan tightly and try again it might be overheating.

Jan 07, 2009 | Intel (5184-0062) Processor Board

3 Answers

The power on my pc keeps recycling


remove all hardware except RAM n CPU and then try it if the system gives you a disply then add all hardware 1 by 1 and keep checkin this way you can find the problem with the harware compatibility if the system wont disply then check the mobo for RAMs and CPU respectively if the problem presists then you have the BAD BOARD.-

Jan 16, 2008 | Intel D845GLLY Motherboard

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