I have a jetway 867AS motherboard. I am having serious problems with my system at the moment. I am not sure whether the fault lies with the motherboard or with the power supply in the system in question.

The power supply is a Codegen 300watt Model 300X power supply.

I previously had an AMD 1600+ CPU with a ThermalTake Volcano 7 CPU fan attached. The Volcano fan stopped functioning and my AMD CPU also stopped functioning. I was very distressed (naturally) but assumed that the malfuntioning Volcano fan was responsible for the CPU overheating.

Today I purchased a brand new AMD 1700+ CPU and inserted it in the Jetway 867AS motherboard with a working ThermoSonic CPU fan. I know it was working because it came from another functioning machine.
When I turned on the computer I entered the BIOS to check the settings, while in BIOS the CPU fan stopped working and then started working again I assumed this may have been some sort of heat sensor control on the motherboard, but then the fan stopped working completely. Hopefully my new CPU is still ok, I have no way of testing it at the moment.

I guess I need to know where I should be pointing the finger, at Jetway, Codegen or myself, I've built a number of machines in the past and never encountered such a problem.

Thanks.

If you had this hooked to the onboard sensor guess I would say the Board. And if you were running an AMD and it was not turned off the seconed the fan stopped running most likly it has fried but you will not know until you can test it.It only takes a matter of seconds to fry AMD's

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YODA74@windows-sucks.com
CCMR (http://www.dreamwater.net/tech/yoda74/index.html)

If the original CPU fan was connected to a motherboard fan terminal, then it's possible that the terminal got fried. This often happens when a high CFM fan is connected to a MB terminal. The terminal just does not have the capacity to handle the large amp draw from a powerful fan.
Solution? Connect the fan directly to one of the power supply module's 12 volt connectors. You'll probably need a 3 pin-to-Molex adapter to do this, but they are readily available on the Web.
If the CPU fan was connected directly to a 12 volt PSM connector, then suspect a defective PSM.
Also, Athlon XP CPU's draw a lot of power, and when coupled with high powered video and sound cards the PSM can get overloaded. Check the specs on your existing PSM. If the combined '3.3V + 5.0V' rating is less than 180 watts, then you may want to consider replacing it with a larger(400+ watt) unit.

Thanks guys, I did have the fan connected via the motherboard connector.
So if what you're both saying is correct then I need to be pointing to the motheroard for my solution and in the furure I'll try running fans from the 12volt connectors instead and see what happens.