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fan CPU spin for a few then power off

By egunn ·
Recently, I bought the following hardware components in order to upgrade my old computer;
Intel E6300 Core 2 Duo Processor (Retail version)
Gigabyte GA-965P-DS3 Motherboard
pqi TURBO 1GB 240-Pin DDR2 SDRAM DDR2 667 (PC2 5400) 4-4-4-12(worked fine in other pcs)
Maddog 500W Power Supply (SLI Ready)(worked fine in other pcs)
Western Digital 320GB SATA II 7200RPM Internal Hard Drive(worked fine in other pcs)

After installing all the above items in the computer case, I tried to power it up for the first time. The cpu fan and system fan take about a second then start spinning then stop and the PC just powers off, no beep codes nothing. Used a screwdriver to power on PC bypassing case still the same thing.

After reading a post here, I removed the system board, CPU and its fan out of the case. The fan ran steadily without stopping if I only connected the system board to the power supply alone without the CPU and its heat sink/fan. The problem re-emerged after I installed the CPU.

Took it out and reseated it one more time and will now spin for a few minutes but I get no output. I visually inspected the socket and it looks like a couple of pins don?t line up with the rest like they are bent, but I was very Carefully and put the CPU in properly each time. I tried pulling up the pins but haven?t had much luck. Is this likely the problem? Why does it spin for a few minutes now. This was purchased at New Egg, any idea how good they are with an Replacement is cases like this?

Thank You

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by mjd420nova In reply to fan CPU spin for a few th ...

It could be the temperature sensor pins that are intermittent, and sensing over temp and shutting down. If some pins got bent, there may be more going on with the socket and the CPU may be faulty, especially after having some partial power applied. Be really carefull with the pins and double check the pin one orientation. There is the possibility the system board is not compatible with that processor, being so new, or a jumper berg is not set right.

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by HAL 9000 Moderator In reply to fan CPU spin for a few th ...

Well as you have stated you have an Intel 965 Chip Set M'Board that will support that CPU without a problem.

The main reason that this happens is that the M'Board is faulty and not sending the signal back to the PS to keep it running so it turns off. As the 775 Sockets have a cutout either side of the socket to line up the CPU against it's virtually impossible to fit the CPU incorrectly but I've seen it done once. When I fitted the CPU Correctly it worked properly without a problem so I would first make sure that the CPU is sitting properly in the Socket before closing it and placing the Heat Sink/Fan to the M'Board and try again. If it doesn't work now either the CPU or M'Board is faulty.

My first guess would be the M'Board as I've never had to replace a 775 CPU Yet but that doesn't mean to say that it's not possible that the CPU is toast it's just less likely from my experience.

Col

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by HAL 9000 Moderator In reply to

Also try it with a Known Good PS as I got caught out with a new Antec PS that was faulty not completely dead but 99% of the time it wasn't supplying enough power to start the system up and keep it running. I've only seen this once so I now keep a Known Good PS on hand to do any testing with just to be on the safe side.

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by egunn In reply to fan CPU spin for a few th ...

Thanks for the input so far, yes the CPU is in correctly like you said with the 2 tabs, youd really have to force it in to fit it properly, but the creaking when closing the CPU door always makes me nervous :)

After reseating everything I looked at the CPU socket and something dosent look right, it looks like bents ns but its not as I counted all the pins and they all line up, now however the MB wont boot up at all with or without the CPU, the CPU itself looks fine upon visual inspection.

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by egunn In reply to fan CPU spin for a few th ...

I should also note that when I connect my Powersupply to the system im replacing, a Celeron 3.06ghz, 2 mb ddr2 ram, 320gb sata drive, 7900gt 256mb the Power Supply boots the system up just fine.

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by egunn In reply to fan CPU spin for a few th ...

Doing some more research I found several others that had the same symptoms, then bought a stick ov 1.8V Ram to get the system to boot then update the bios to get the system to work. I wouldnt think Ram would cause symptoms like that but Im gonna try it, bought some 1.8v Ram at Circuity City and will pick it up after work and post my finsings incase anyone else runs into this.

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by egunn In reply to fan CPU spin for a few th ...

It was the RAM, I borrowed a stick of 1.8v DDR2 Ram and the system booted right up, after getting the OS installed I updated the bios and replaced the 1.8v with my 2.0v ram and it works fine now.

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Holy crap. Why didn't I think of that?!!

by matt.chown In reply to

That worked perfectly!! Thanks. Why would a company send out a mobo/cpu/ram combo that is not compatible together?? Good find!

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