Emax

Hello,

I own a used Emax since 1995, but I don't know which version it is. It
is written Emax HD SE on it, and I suppose it is an Emax II.
Actually, this is not the problem. Since last year, I don't use it
anymore, because I have problems with the power supply. When I switch it
on, it works for a while, and then it crashes and reboots without any
reasons, as if there had been a short electric cut.
Has anyone already had that problem? If yes, is it possible to fix it?
Thanks