I just wanted to take the hd out of one machine and put it in another but it won't work in the second machine. The first machine about 4 years old but pentium 3 chipset 500. Mine is the celeron mmx 433 chipset. HD works ok in 1st machine. Won't boot up in 2nd machine. What other info do you need??? They are both around the same age.
If the mobo is different and drivers different the reg enteries are different is the OS you have different as well? if you wont to swop you need to format the drive and reinstall the OS so it can recognise your system.