Sorry, I don't have an answer but I do have an identical problem where the Player (Both DVD & VHS) will boot up if the electrical supply is changed for around 10 seconds, the VHS will start making sounds as if it is going to kick in then the whole machine turns off and the supply has to be removed and reconnected to get teh same thing again.
I took the power board out and inspected it, Fused link OK, No burnt components, no dry joints and the basic incoming electrical supply metered out after the mains socket.
Friend of mine has suggested Switch mode PS is defective - think this must relate to the multi-voltage output transformer?!?
STill looking as I write
jimidread, May 2009