I have an older ps2(8v.) engine that has completely QUIT. It is a MTH- 20-2282- Southern SD24. No start-up,no sound, no nothing. Just sits there when I try to start up. It was slowly(25smph) running down track and just quit. Will not come up on DCS remote, no eng. to add. Should I have it repaired or just replace with a new ps2(3v.) board? I think it would probably cost about the same to upgrade it as have it repaired. Your thoughts, please!!! Tom