CPU and PSU fans spin, no boot up.

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kbussell

Reputable
Jan 16, 2015
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4,510
So I recently was moving my hardware to a new case. After I installed everything and tried to turn it on, the power light blinked once and then the CPU and PSU fans just spin. I took everything out and tried bread boarding it to test the issue.

I've tried different RAM, one stick at a time in different slots, to two sticks at a time, different PSU's, different CPU's, different CPU fans and even a different power cable (plugged into the wall.)shoot out

At this point I think I've tried everything except a new motherboard, but I wanted other people's opinions of what it could be. Thanks for the help guys.
 
Solution
MarkW
Remove all of the memory sticks and power the system up. If you have a speaker attached to the motherboard, you should hear 3 beeps. If you do not hear any beeps, check your motherboard manual to find out where the speaker attaches,and attach one. If your motherboard did not come with one, amazon has them for as little as $4.49 and some of those have a bunch of them in the package.

Most systens will use a speaker that looks like this
kc1k5j.jpg
If there are no beeps with the memory removed, and speaker attached, it could be the motherboard, the CPU or even possibly the power supply (or the power supply connectors improperly seated).

Before you start doing the items below, remove everything from the system...
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thx1138v2

Splendid
Jun 18, 2011
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Many motherboards will not work correctly unless properly grounded so install the mobo in the case and make sure all attachment holes are populated to metal standoffs connected to the case.

Check all attachment cables and sockets for bent pints as well as CPU.

Then install PSU, CPU with cooler and fresh thermal paste, one stick of RAM and attach monitor. See if it will boot to BIOS. If it boots keep populating one component at a time and boot after each new component installed. If it stops booting you've located the bad component.

If it doesn't boot at that point you've at least narrowed it down to specific components installed.
 
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kbussell

Reputable
Jan 16, 2015
13
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4,510
I tried everything in the case first, before I bread boarded. Forgot to mention that. In the original case and the new case. The BIOS is definitely up to date. It was up to date yesterday and worked just fine until I took everything out and put it in the new case.
 
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MarkW

MarkW

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Dec 7, 2009
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Remove all of the memory sticks and power the system up. If you have a speaker attached to the motherboard, you should hear 3 beeps. If you do not hear any beeps, check your motherboard manual to find out where the speaker attaches,and attach one. If your motherboard did not come with one, amazon has them for as little as $4.49 and some of those have a bunch of them in the package.

Most systens will use a speaker that looks like this
kc1k5j.jpg
If there are no beeps with the memory removed, and speaker attached, it could be the motherboard, the CPU or even possibly the power supply (or the power supply connectors improperly seated).

Before you start doing the items below, remove everything from the system except the CPU, power supply and that speaker that I talked about above. Disconnect all drives, video cards, USB devices, everything that draws power. We are trying to remove all other devices that might possibly be stopping the system from booting up. And we want to see if you can get the beeps of any kind.

Cheapest first thing to do if there are no beeps it to remove and reseat the two motherboard power supply connectors. Those are the 24 pin and 8 pin connectors. Both of those cables are thick, stiff cables and need to snap into their sockets. These cables are tough to work with at times, but this is really the only free fix among the choices you have.

Next cheapest step is most likely to be replacing the power supply itself item.

Following that,will probably be the motherboard itself. While you have the CPU off of the motherboard, check the pins on the CPU to make sure none are bent or missing. If there are bent pins, you may be able to bend them back straight, but watch some YouTube videos on how to successfully do that.

And finally the last thing I see as likely possible, is the CPU itself.

At some point, you should begin to hear the beeps. When you do, add the video card back in, and make sure the system still beeps with that installed. And repeat the attach a single item, reboot and listen for beeps after each and every item. Eventually either something you attach will cause the system to stop beeping and you will found the problem device, or you will eventually add the memory back into the system, and the system will magically fixed itself and boots up for you.
 
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