power on /reset switch problems

Hi,
my wife recently aquired an oldish ex work PC which I would like to reuse
for our kids as the spec is still resonable and it has a fiar amount of
memory /disk - however the problem is the power on and reset switches on the
main case. They only work perhaps once in 50 or so times so I wondered if
there was a way of replacing these or just bypassing the switches and
hardwiring and using the main PSU on/off switch to power the PC?

I'm not sure what effect taking out these switches would have.

Any ideas appreciated -

TIA
Chris