I will start at the beginning,My athlon xp2600 fell over so i changed the hard drive,that wasnt it so i thought i would upgrade a little. I have bought e new mobo and processer heat sink and fan (pre assembled) from a reputable ebay seller. All memory has been checked on differnt mobo and is fine,however when i turn it on there is no post beep and no display, the green light comes on the mobo and the fan runs,pc turns on and off fine. Any ideas? ASUSP5P800VM mobo and intel fan and heatsink with 775 pin p4 2.8ghz. Ebay seller has only 7day return policy do you guys think its faulty?
First thing to do is check whether you have connected the extra 4 pin 12v connector (sqare shaped) needed by the P4 cpu.It wont boot if that isn't connected.
Otherwise it could possibly be a short circuit from the motherboard to the case via one of the risers ....try building the motherboard/one stick of RAM/CPU and fan on an insulated pad outside of the case.
Connect up the monitor, power supply and on/off switch......no need for a hard drive or anything else.
When you switch on it should go through POST and stop when it can't find an operating system.
Brilliant!! I have beeping,hard drive spinning and above all vision....that says bad bios checksum. installed the support cd, reads the file tells me its completed then asks me to power down. Power on again same thing,