woah there
Your quickie was a little too quick there
you switch on you get the celeron ... the flashy thing.... then nothing...
the flashy thing has two functions ... the POST (power on self test) and the handover to the OS ... depending just what's failed ... it could be the HDD ... it could be something else .... (although is probably is the HDD)
you have another machine .... so take a second and visit
http://bootdisk.com/bootdisk.htm
... download the Windows 98 SE OEM bootdisc
create a floppy (just run the file with a floppy in the drive)
and then booting with it in the problem laptop.
assuming that your XP is using NTFS ... you won't be able to read the HDD ... but if the machine boots ... at least you are 90-95% certain its the HDD
some timeouts can take what seems forever.... if no joy just look at the flashy thing for at least a cup of tea ... see if it does anything...
if not ... go to the hdd shop