Hello,
I just Installed a new Motherboard in my Hp Pavilion 514x, and everythign works fine until i try to load windows xp form my hard drive, it flashes a blue screen vary breifly and the CMOS setting are correct when I get the error msg, itz a Biostar P4M900-M4 with an old Celeron CPU

If you are getting a CMOS Checksum Error then you need to reset the CMOS memory in the Motherboard. This usually involves moving a jumper from one place to another for a few seconds and returning it. Your motherboard manual will show you where to find it.

You will then need to go into the BIOS and reset the settings, particularly time and date and check the the hard drives, CD drives are being detected properly. Save the settings and re-boot.

You still wont get XP to boot unless the new motherboard and CPU is identical to the old one as XP will be configured for the old motherboard.

You need to boot from your Windows XP CD and do a repair install. I'm not sure you can do that with an OEM CD which you probably have but someone else familiar with OEM CDs should be able to tell you that.

Stuart

I'm about 85% sure you can do this with oem cd's.
The problem is is that most oem's make unattended installs which control the partitions automaticly, there for the option of performing a repare install is not there.

Since you changed the board you're gonna have to reinstall XP. The HP CDs are no longer useable because they are tied-in to the old board.

depends on the type of oem cd you have. if it is one of those ones that is just an image of the drive, it won't work. If it is one that actually install's XP, it will work but, you will run into the activation problem.

larry