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Help! Can't get new M/B-CPU to work

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by bobbearden

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Help! I know enough to be dangerous, so please bare with me...

I have a P4 1.5 and I am trying to ungrade to a 2.4 w/800Mhz FSB. Computer works fine, but when I install new MB/CPU it won't boot up; it just beeps (Alarm) about every 5 seconds. I reinstall the old CPU/MB and it works fine. I've tried clearing the CMOS, changing the memory, changing the power supply (needed to anyhow, as the old was only 300W). I have check the jumpers and they are set correctly. Ideas?

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by thechas

Please repost this in the Technical Q&A section along with FULL details of your hardware.

Motherboard make and model
CPU model not just clock speed as Intel has several different 2.4GHz CPUs.
Video card
RAM

Chas

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