
Hi Let_go,
Welcome to PCHF. We have a wonderful team of techs and a few hardware gurus, I am sure that we will be able to help you figure out what's going on.
I have a few questions that will help us to help you troubleshoot the problem.
When you boot up, are you asked to choose which harddrive you want to boot up into?
If you boot up using the 80G HDD, do you see the 200G listed as a drive?
You say it worked fine, and then you booted up in the morning, and it stuck at the splash screen, what if anything was installed or uninstalled hardaware or software before this happened?
When you tried the HDD in your friends computer, did you install it as a second HDD? Slave to his primary? or did you replace the main HDD?
Have you tried removing the 80G, only installing the 200 and completely wiping and recreating the partitions? Then only formatting the main partition, installing your OS, then formatting the other drives from within Windows?
Looking forward to your reply,
TTFN
LGW