Re: computer wont start
 

Yep, anything the same or above watts will be fine.
Don't get one that is less than the current wattage.

Re: computer wont start
 

And ensure you get the one with the extra connection for graphic cards if necessary.

Having been bitten by PC PSU's several times, I wouldn't reccomend opening one unless you are very sure of yourself.

A PSU tester has become my best friend:

http://www.ebay.co.uk/itm/PC-20-24-P...item41562897ff