Swapping HD from Celeron PC to P2 PC, Windows won't start

HD donor PC is an old, self built ATX case, Celeron CPU, Intel D845EPI/D845GVSR Mboard. It was running fine until I removed the CPU cooling fan assembly to clean it Completely blocked with dust/nicotine/ect. The CPU came out with the fan assembly and fell, badly bending a pin on the CPU. No big deal. But I need to run that hard drive so I installed it in my Compaq 5170 but the boot process only gets through the memory check, then a cursor in the upper left of the screen blinks... and continues to blink.
At first boot there was a screen saying that the drive changes were being updated, then the cursor blinked for ~ 10 minutes. I restarted 3 times and it still won't get past the memory check - cursor blinking screen.

Both PC's are IDE - the HD in this machine (the Compaq) which I'm online with now with the old HD re-installed (working fine), is jumpered to master. I jumpered the HD in question to master (which is actually no jumper installed according to the lable on it.

Why is it not starting?

This HD in the Compaq I'm using at this moment is a Seagate ST310212A -
and the drive that was working fine earlier in the donor PC, that I'm trying to run on here, is a WD 1600AAJB.

While the cursor is blinking I don't see any evidence of HD activity via the light on the front panel.

What now.

Links to specs on this hardware:

Seagate ST310212A

http://www.seagate.com/ww/v/index.j...00000dd04090aRCRD&locale=en-US&reqPage=Legacy

WD 1600AAJB
http://www.newegg.com/Product/Product.aspx?Item=N82E16822136112

Compaq 5170http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&dlc=en&cc=us&docname=c00191266

Intel D845 GVSR
http://www.intel.com/support/motherboards/desktop/d845gvsr/sb/CS-027150.htm

 

My guess is that the BIOS in your Compaq does not support larger hard drives:

http://support.microsoft.com/kb/303013

 

Does the drive still have an Operating System installed?
Could be that Windows is not recognizing the system configuration and has all the wrong drivers for the devices.

 

hrlow2 is right. if the computer boots to a blue screen, you'll have to do a repair install to install the propper hdd device drivers.

that is of course, if, like satrow mentioned you bios accepts a larger hdd