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CPU and chasis fan runs but computer does not post, boot or beep

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UP..memory motherboard failure..most likely.

Posted on Jun 03, 2008

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Computer wont boot, the fans keep running


Does it come with any beep sound, because beep sound clarify the fault. Check it by the way.
The list is given below.

No Beeps Short, No power, Bad CPU/MB, Loose Peripherals
One Beep Everything is normal and Computer POSTed fine
Two Beeps POST/CMOS Error
One Long Beep, One Short Beep Motherboard Problem
One Long Beep, Two Short Beeps Video Problem
One Long Beep, Three Short Beeps Video Problem
Three Long Beeps Keyboard Error
Repeated Long Beeps Memory Error
Continuous Hi-Lo Beeps CPU Overheating

best of luck!

Mar 07, 2012 | Compaq Presario S4040SE - (refurbished)...

Tip

A Comprehensive Guide on Computer Beep Codes. (AWARD BIOS)


When a computer is booted up its BIOS, it performs a power-on self test, also known as POST, to test and verify the computers hardware and to make sure all components are working properly. Here's a comprehensive guide on how to determine which component has failed on a particular beep code and give you an idea on where to start for troubleshooting.

The exact meaning of the beep codes depends on the type and version of BIOS that you have. The three most popular types of BIOS are those made by Award, American Megatrends (AMI) and Phoenix. If you are using a PC made by a company that writes its own BIOS, e.g. DELL, HP, etc, you will have to consult your PC user's manual or the company's web site for assistance.


Beep Codes for Award Bios.

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1 long, 2 short = Video adapter error

Troubleshooting: Either video adapter is bad or is not seated properly.

Repeating (endless loop) = Memory error

Troubleshooting: Check for improperly seated or missing memory. Reseat the memory if you can.

1 long, 3 short = No video card or bad video RAM.

Troubleshooting: Reseat or replace the video card.

High frequency beeps while running = Overheated CPU

Troubleshooting: Check the CPU fan for proper operation. Check the case for proper air flow.

Repeating High/Low = CPU failure.Either the CPU is not seated properly or the CPU is damaged. May also be due to excess heat.

Troubleshooting: Check the CPU fan or BIOS settings for proper fan speed.


I will be posting more tips on other versions of BIOS.
Hope this helps.

on Mar 25, 2011 | Computers & Internet

1 Answer

CPU fan and chasis fan runs at twice the regular speed of 2k rpm and 1k rpm respectively. The cpu temperature is normal and pc is in a cold environment. This seems to happen more when I watch online...


It is absolutely normal, CPU fan RPM can go as far as 3500 Rpm and Chassis fan as far as 2000Rpm. Best to have a cool PC, if you would like you can take a look at my tip entitled My Computer is not turning on!!! Is it dead!!! No POST!!! it explains every-thing.

Thanks
damnor01

Nov 11, 2010 | Computers & Internet

1 Answer

Not sure if it is MB or CPU when i try to turn on computer the only thing that happens is i hear a beeping sound. beep...beep...beep... continually. it wont go to the post, nada. the fans run and i have...


Continous beeps usually mean the motherboard or the power supply, Try another power supply first and see if it will boot, if not the motherboard is faulty, if the prossesor was faulty you would no beeps the fans would run but nothing on the screen. hope this helps.

Aug 24, 2010 | Computers & Internet

2 Answers

The desktop won't reboot. The power light stays yellow. I hear a fan running, but the monitor says no signal.


If your fan runs and the hard drive spins up, then you have a video card problem.
I'd do this: Disconnect everything inside the case but the CPU, memory, and video. Now try to boot. Also observe the fan on the CPU--does it spin?
If this fails, then your video has probably gone bad. Also--does your computer usually give you a "beep" when it starts up? If so, is it giving you a beep now? If not, you're failing the hardware startup test (POST).
So, your problem may be the video card. If your video is part of the motherboard, then you need to replace the motherboard.

Oct 01, 2009 | Computers & Internet

1 Answer

My Screen is blank and fan continuously runs.


your computer is not posting that is why you do not hear a beep. This can happen for 1 of 10000000 reasons but I would start with checking the RAM then all the other hardware to find a loose connection/dead hardware.

May 28, 2009 | Compaq (203966-001) Motherboard

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

2 Answers

No beep,No Display on my monitor,only CPU heatsink fan is moving


have you thought about changing the battery on the motherboard, also checking that the fan on the cpu is seated properly with enough heatsink paste as both these issues will stop the pc from booting

Oct 29, 2008 | Asrock K7S41GX Motherboard

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