Oh... and I would add. If it is the power supply... stop turning it on.
You don't want power surges going through the system as that is the way to make the HDD not be salvageable.
The age of that machine, I wouldn't buy another PSU as it's likely going to be the price of that machine.
What I would consider (if you're really broke and need a cheap solution) your local high street computer store (the small one with dusty boxes run by a solo older guy) will sell a fully complete and working machine for £100-200 including Windows, etc. Get that and plug in the old HDD and copy things over.
Thanks again, that was going to be my next question about replacing the PSU given that I built it for him using parts sourced separately and yes you correctly identified that it was quite a few years ago.
Oh... and I would add. If it is the power supply... stop turning it on.
You don't want power surges going through the system as that is the way to make the HDD not be salvageable.
The age of that machine, I wouldn't buy another PSU as it's likely going to be the price of that machine.
What I would consider (if you're really broke and need a cheap solution) your local high street computer store (the small one with dusty boxes run by a solo older guy) will sell a fully complete and working machine for £100-200 including Windows, etc. Get that and plug in the old HDD and copy things over.