i bought a used board labeled P4G533-LA which is an asus oem for hp. the bios is labeled echo4 - 3.02 and hp has a number of models using the echo4 board but i don't know which one this is.
problem is when i turn it on, it goes to the hp startup screen and within 2 seconds or so does a steady beep and that is as far as it gets. i have tried different ram and different psu. the cpu was a celeron 2.4 / 400. this is a 400ghz board and the cpu works in a different computer with no problem.
any ideas.

thanks