New
#11
Don't try to buy an IDE drive. The problem is new IDE drives haven't been made in over 10 years. Even if the drive is supposed to be unused or refurbished there is no guarantee how long they will last.
I tried that earlier this year. The IDE drive I got showed 0 hours on it but it failed after only running 1 hour. I returned it and got my money back. I gave up on trying to use IDE drives on my 20 year old computers. Now they are both using SATA drives. Even the 300GB SATA drives I bought are refurbished but at least they are a lot newer than the IDE drives I tried to buy.
BTW, one motherboard has 2 SATA ports so was easy to use SATA drives. The other motherboard didn't. I had to use a SATA PCI card for the SATA drives.
You said you replaced the BIOS battery? After that did you set the date/time in the BIOS? With a good battery the computer should keep time even if the computer is unplugged.