Solve : PC won't boot. CPU fan pulsates constantly. No signal to monit

1.	Solve : PC won't boot. CPU fan pulsates constantly. No signal to monitor.?
Answer» I have a Compaq SR1610NX with the following: Motherboard Name: MS-7184 AMD Sempron 3200+ 1.8 GHz:256MB PC3200 RAM Integrated graphics and sound The problem I am having is when powered on there is no signal to the monitor and the CPU ffan constantly pulsates on and off. I have checked the power supply, HDD, and DVD drive. Can anyone give me any ideas of what else to check or any possible solutions to my problem? Any help WOULD be deeply appreciated! Thanks for your time and efforts! Bowman65 What happened before this started?Calum, According to the owner it started getting really loud and she turned it off.Clean heatsinks. ^^what Data said While you're at it get the dust off the blades of the fan. When dust builds up it throws the balance off. Sounds like a heat issue because the CPU fan probably has a built in sensor that REGULATES the RPMs with respect to the CPU temp. I'd also try to see if you have another 3-pin plug on the mobo....maybe labled "CPU-fan 2" and try the fan in that ONE. Quote from: bowman65 on May 04, 2007, 11:14:02 AM I have checked the power supply, HDD, and DVD drive. How did you check these? Nominated for question of the Month. I checked the HDD, Power Supply and DVD burner by changing them to known good components and it had the same symptoms. Thanks for the idea about the fan and also about the heatsinks. What is a good way to clean them?A can of air duster, and if any dust bunnies are stubborn you can use a cloth w/ a little water & alcohol solution. I had the pulsating fan before, I think it was on my AMD TBird, year of 96... anyway a long time ago so I'm having trouble remembering what the remedy was. Same exact symptoms too. Try removing all the non essential stuff from the PSU. DVD CD ROM etc... and see if it boots up. Do you know how to check the rails on the PSU w/ a volt meter?Do you know how to check the rails on the PSU w/ a volt meter? [Nuclear Playboy /quote] By PSU you mean the Power Supply, correct? If so, yes and have. That was one of the first things I did. Here's where I am now. I took the motherboard out and cleaned it with air, using my air compressor. I put it back together and had signal but no KB or Mouse function. Shutdownand turned back one and back to square one. Pulsating Fan, No Signal to Monitor. What do you mean by clean the "heatsinks". What on the MB are you refering to as the "heatsinks"?On top of the CPU if your MBoard has them...also on some but not all Vid cards. It could still be the PSU though. The voltage test is not always accurate as the PSU is not under load CONDITIONS. BORROW one of a similar or greater wattage and swap it in there to see...

Solve : PC won't boot. CPU fan pulsates constantly. No signal to monitor.?

Answer»

I have a Compaq SR1610NX with the following:
Motherboard Name: MS-7184
AMD Sempron 3200+ 1.8 GHz:256MB PC3200 RAM
Integrated graphics and sound

The problem I am having is when powered on there is no signal to the monitor and the CPU ffan constantly pulsates on and off. I have checked the power supply, HDD, and DVD drive. Can anyone give me any ideas of what else to check or any possible solutions to my problem? Any help WOULD be deeply appreciated!
Thanks for your time and efforts!
Bowman65
What happened before this started?Calum,
According to the owner it started getting really loud and she turned it off.Clean heatsinks. ^^what Data said
While you're at it get the dust off the blades of the fan. When dust builds up it throws the balance off. Sounds like a heat issue because the CPU fan probably has a built in sensor that REGULATES the RPMs with respect to the CPU temp. I'd also try to see if you have another 3-pin plug on the mobo....maybe labled "CPU-fan 2" and try the fan in that ONE. Quote from: bowman65 on May 04, 2007, 11:14:02 AM

I have checked the power supply, HDD, and DVD drive.

How did you check these?

Nominated for question of the Month.

I checked the HDD, Power Supply and DVD burner by changing them to known good components and it had the same symptoms. Thanks for the idea about the fan and also about the heatsinks. What is a good way to clean them?A can of air duster, and if any dust bunnies are stubborn you can use a cloth w/ a little water & alcohol solution.

I had the pulsating fan before, I think it was on my AMD TBird, year of 96... anyway a long time ago so I'm having trouble remembering what the remedy was. Same exact symptoms too.

Try removing all the non essential stuff from the PSU. DVD CD ROM etc... and see if it boots up.

Do you know how to check the rails on the PSU w/ a volt meter?Do you know how to check the rails on the PSU w/ a volt meter?
[Nuclear Playboy /quote]

By PSU you mean the Power Supply, correct? If so, yes and have. That was one of the first things I did.

Here's where I am now. I took the motherboard out and cleaned it with air, using my air compressor. I put it back together and had signal but no KB or Mouse function. Shutdownand turned back one and back to square one. Pulsating Fan, No Signal to Monitor.

What do you mean by clean the "heatsinks". What on the MB are you refering to as the "heatsinks"?On top of the CPU if your MBoard has them...also on some but not all Vid cards.

It could still be the PSU though. The voltage test is not always accurate as the PSU is not under load CONDITIONS. BORROW one of a similar or greater wattage and swap it in there to see...

Solve : PC won't boot. CPU fan pulsates constantly. No signal to monitor.?

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