The HMM for the IBM T43 indicates it uses IDE drives. 30GB to 80GB and
had XP Home or Professional on it when shipped. I was able to recover
an Windows 2K drive that was unbootable even after a reimage, once
Linux had been installed on it.

If you have critical data on the drive professional recovery may be
required before trying this fix.

Create a Win98 boot disk with fdisk on it. Boot to a dos prompt and run
fdisk /mbr This should repair the master boot record. This fix has also
been able to correct page size errors that prevent Win2K systems from
booting.