|"...I'm a computer techician...."|
In that case, why is your information not clear enough?
It should be no problem for you to .....
"Tell us the make and model of the brand name system,
or the make and model of the mboard."
"....this is a pentium4 1.9 GHz (the 1st that was sold), with an intel mainboard."
So it's an older mboard.
I can only guess from that on thissystem you may have a floppy drive, and you probably don't have SATA headers on the mboard, or any SATA drives.
"...i even got to the point when it says that system will boot in 15secs to restart. It restarts and when thats when i get the message BOOT FAILURE,..."
So - it only got through the first stage of Setup?
" I did had to re set the date and time......"
"Is it CMOS battery problem?"
If you didn't clear the cmos or flash the bios, which would set the bios settings to defaults including the date and time, obviously the cmos battery is too weak or dead, or the battery is upside down, or it has a poor connection in it's socket, or a contact is bent and it isn't touching the battery. Coin shaped cmos batteries typically last about 5 years - if that's never been changed it's probably too weak or dead.
Usually the cmos will retain settings once you set them when the battery is having a problem as long as the computer is still running, but it's possible it loses some settings but not others when you reboot. You're going to need to replace the cmos battery anyway if it's too weak or dead, so you might as well try doing that.
What was the reason you were re-installing Windows?
A defective hard drive could cause your problem.
Did you check the hard drive with the drive manufacturer's diagnostics?
Since this is an older mboard, it's quite possible you have the bad capacitor problem.
This was the original bad capacitor problem - has some example pictures.
History of why the exploding capacitors and which mboard makers were affected:
What to look for, mboard symptoms, example pictures:
Home page that site
- what the problem is caused by
- he says there are STILL bad capacitors on more recent mboards.
Did you by any chance change the ram from what was installed in this mboard before when it was working fine?
If so, did you test the ram with a memory diagnostic program after you installed it?