I never had any problems with the original 250W power supply,
but I did go ahead and change it out in favor for a 300W Fortron PSU.
The Fortron 300W was the biggest AT supply I could find still
available that was affordable. The only modification required was
to the P8 and P9 connectors. Some of the plastic ribs on the back of
the connector had to be filed down. If you find a replacement power
supply that is reasonable, I say go ahead and change it. Unless the
original is on its last leg, it should work fine until you find something you like.
C Snyder