I have a A7V400-MX motherboard, i have tried several processors with it(AMD 2000, 2200, and 2600).. 2 - 512mb sticks pc2700....
when I power the machine up, it shuts down briefly after a few seconds, then starts back up, and then shuts down again after a few seconds.... and then the power button is functionless unless i hold it down for about 5 seconds and i can do it all over again... i've tried all the dip switch speeds on the motherboard... if i set it to 100/66/33, then it will get along the farther to the motherboard's splashscreen and cut off again.
-Throughout all of this the LED remains lit on the motherboard.
- I don't think it's the hard drive because it never gets far enough to start reading the hard drive- but i disconnected it and tried it for argument's sake... same result
- I've cleared the CMOS
- I've tried both the graphics card and the onboard graphics... same result.
My only guess is that i don't have the right combination of hardware and/or settings, being that changing the dip switches is the only thing that has somewhat of an effect???
You may want to try using another power supply rated at 300W plus. Also make sure your RAM is unbuffered and non-ECC. To set the switch correctly, you need to goto look at the exact model number of the CPU. Because CPU with similar marketing name could have different front side bus speed.
One more thing to look for, make sure there is no metal standoff sticking out of the bottom of the case shorting out the mother board. But my first guess is the power supply.
It is very confusing indeed. The processor's operating frequency is determined by the FSB clock multiplies by the multiplier. The resulting speed should not exceed the manufacturer's rating except in the case of over-clocking. So as the FSB clock. Setting the FSB clock higher than the rated speed will generally cause unstable operation.
The memory clock should not be higher than the rated speed of the memory. The PCI clock setting depends on the chip set. For most PC's, it is usually 33mhz. Most severs can run the PCI clock at 66mhz, 100mhz or 133mhz. It is not a good idea to run the PCI clock and higher or lower than the standard speed.
I hope this helps.
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It would appear to be a MoBo problem as you can't enter the BIOS during the POST process so it doesn't even get to the HDD
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UPDATE...
i started looking for other documentation, i found a manual slightly different from mine that says this motherboard uses 2.25GHZ processor and above... so i went back to the 2600 processor i had in it before. This processor has a bus speed of 333. I set the motherboard dip switches to 166/66/33. Also used the same 2 - 333 512 sticks of ram. this time it loaded up to the windows login screen...... and then it shut off....
so i set the dip switches on the motherboard to 133/66/33 and restarted it, and its been up for about 3 hours now. I am going to have to get more versed in frequencies and settings, i know... but i am quite sure i used this same setup before without success (several times)...
can anyone speak the general rules as far as frequencies and hardware and speeds, etc..... meaning... what should be faster than what, or what should be slower than what... or what should never be done? or does anyone know where to find a decent plain-english guide to that kind of stuff.
UPDATE...
i started looking for other documentation, i found a manual slightly different from mine that says this motherboard uses 2.25GHZ processor and above... so i went back to the 2600 processor i had in it before. This processor has a bus speed of 333. I set the motherboard dip switches to 166/66/33. Also used the same 2 - 333 512 sticks of ram. this time it loaded up to the windows login screen...... and then it shut off....
so i set the dip switches on the motherboard to 133/66/33 and restarted it, and its been up for about 3 hours now. I am going to have to get more versed in frequencies and settings, i know... but i am quite sure i used this same setup before without success (several times)...
can anyone speak the general rules as far as frequencies and hardware and speeds, etc..... meaning... what should be faster than what, or what should be slower than what... or what should never be done? or does anyone know where to find a decent plain-english guide to that kind of stuff.
UPDATE...
i started looking for other documentation, i found a manual slightly different from mine that says this motherboard uses 2.25GHZ processor and above... so i went back to the 2600 processor i had in it before. This processor has a bus speed of 333. I set the motherboard dip switches to 166/66/33. Also used the same 2 - 333 512 sticks of ram. this time it loaded up to the windows login screen...... and then it shut off....
so i set the dip switches on the motherboard to 133/66/33 and restarted it, and its been up for about 3 hours now. I am going to have to get more versed in frequencies and settings, i know... but i am quite sure i used this same setup before without success (several times)...
can anyone speak the general rules as far as frequencies and hardware and speeds, etc..... meaning... what should be faster than what, or what should be slower than what... or what should never be done? or does anyone know where to find a decent plain-english guide to that kind of stuff.
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