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How can I check if my CPU is working?

post #1 of 39
Thread Starter 
My PC won't boot. I've tested RAM and GPU in another PC and they both work. Power supply turns on and spins its own fan. When I press the power button the GPU fan spins and Antec case fans connected directly to the power supply spin. The only thing that is wrong seems to be the CPU fan, when I press the power button all the other fans spin and it tries to start to spin for 0.1 seconds then stops. When I connect my CPU fan to a 3 pin header on my mobo and press the power button, it turns on instantly and spins at full speed suggesting that the actual fan itself works. Due to the fact that my GPU fan spins and my cpu fan when I connect it to a 3 pin header, can I assume that my mobo also works? Is there any way I can test if my CPU is working? It's a 555BE and I don't have any AMD computers around so can't test it on them.

Help me guys.

Thanks.
My System
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555 BE Gigabyte GA MA770 UD3 8800GT 2x1GB Corsair Ballistix 800MHZ 
Hard DriveOptical DriveOSPower
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Case
Antec 300 
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My System
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CPUMotherboardGraphicsRAM
555 BE Gigabyte GA MA770 UD3 8800GT 2x1GB Corsair Ballistix 800MHZ 
Hard DriveOptical DriveOSPower
1TB Samsung F3 Samsung SH-S223C Windows 7 Ultimate 64Bit Corsair VX550W 
Case
Antec 300 
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post #2 of 39
Are you getting any beep codes or anything at boot?
post #3 of 39
Thread Starter 
I have an Antec 300 case which I'm pretty sure didn't come with a case speaker, is that the only way to get beeps? Nothing comes up on the screen at boot.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
555 BE Gigabyte GA MA770 UD3 8800GT 2x1GB Corsair Ballistix 800MHZ 
Hard DriveOptical DriveOSPower
1TB Samsung F3 Samsung SH-S223C Windows 7 Ultimate 64Bit Corsair VX550W 
Case
Antec 300 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
555 BE Gigabyte GA MA770 UD3 8800GT 2x1GB Corsair Ballistix 800MHZ 
Hard DriveOptical DriveOSPower
1TB Samsung F3 Samsung SH-S223C Windows 7 Ultimate 64Bit Corsair VX550W 
Case
Antec 300 
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post #4 of 39
Is your heatsink seated ok, also is there any bent pins etc where you plug the cpu fan in as that may suggest your mobo not reading the fan might be an error with mobo. Yes you could do with borrowing/buying one to check if you are getting beeps, as it would help.
    
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post #5 of 39
Quote:
Originally Posted by Mr_Brit View Post
I have an Antec 300 case which I'm pretty sure didn't come with a case speaker, is that the only way to get beeps? Nothing comes up on the screen at boot.
The board should beep, not the case
Mark IV
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post #6 of 39
Thread Starter 
Really? I've never heard the board beep and I've had it for several days now before the PC stopped booting.
My System
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CPUMotherboardGraphicsRAM
555 BE Gigabyte GA MA770 UD3 8800GT 2x1GB Corsair Ballistix 800MHZ 
Hard DriveOptical DriveOSPower
1TB Samsung F3 Samsung SH-S223C Windows 7 Ultimate 64Bit Corsair VX550W 
Case
Antec 300 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
555 BE Gigabyte GA MA770 UD3 8800GT 2x1GB Corsair Ballistix 800MHZ 
Hard DriveOptical DriveOSPower
1TB Samsung F3 Samsung SH-S223C Windows 7 Ultimate 64Bit Corsair VX550W 
Case
Antec 300 
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post #7 of 39
Its kinda hard to troubleshoot without some sort of notification, but I'll give it a whirl.

Ensure your video card has proper power. If there are connections on it, ensure they are plugged in. If your PSU does not have the power connectors, your video card should have Molex convertor connectors. You might need a new PSU despite that.

Ensure your CPU has proper power. Your mobo should have a 8-pin CPU power connector. If you don't have a connector on your PSU, then you need to buy a new one.

I'm assuming you have 2 sticks of memory. Remove one and try booting. Then try vice-versa. If neither boot, try a different channel.

If all of that fails... then it might be your CPU. CPUs are very resilient. We can't be for sure because you have no way of notificaiton either by beep or visual LED.
post #8 of 39
I would assume that based on the fact that the CPU fan spins up when connected to the PSU, but not when connected to the Mobo header, you have some type of problem with power on the Mobo. Check the connections at the 24pin, and 4pin ATX to ensure they are secure. If they are secure, I would first suspect the Mobo, 2nd possibly the PSU (but most likely not since it is single rail, and providing some power)... before I would think CPU.
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Rusty Metal
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post #9 of 39
Quote:
Originally Posted by MentalPatient View Post
The board should beep, not the case
Quote:
Originally Posted by Mr_Brit View Post
Really? I've never heard the board beep and I've had it for several days now before the PC stopped booting.


some mobos comes with built in speakers, like mine, that has a speaker, and a little numeric LED display to indicate the exact error of the beep!


but every mobo that hasn't a built in speaker should have conector for you to connect one... any will do, it is a 1x4 pin connector, usually near the front painel conectors...

you could ask for a friend for a speaker, and connect to your mobo... try to post it, and listen to the beep with your mobo's manual in hand...
Just watch for how to properly connect the speaker, because they usually come with all black wires, so triple check before connecting oen of these...


well, if you can't manage to get a speaker on your mobo, you will have to go throught all basic troubleshoting (troubleshot for everything) , instead of knowing which thing you need to do
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post #10 of 39
Quote:
Originally Posted by xandypx View Post
I would assume that based on the fact that the CPU fan spins up when connected to the PSU, but not when connected to the Mobo header, you have some type of problem with power on the Mobo. Check the connections at the 24pin, and 4pin ATX to ensure they are secure. If they are secure, I would first suspect the Mobo, 2nd possibly the PSU (but most likely not since it is single rail, and providing some power)... before I would think CPU.
Also note, that the 4-pin xandypx speaks of is similar to the 8-pin connector. I'm just assuming you have a 8-pin header on your mobo. Maybe you have a 4-pin connector in half of the header, but your setup requires the 8-pin for more juice?
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