Turbo Express Cap Questions

[Slypty]

Found a guy in Toronto selling 'the first' Turbo Express in Canada, it was imported by his Father before it hit Canada, and managed to keep it in the Box with manuals, 8 very good games, all for $150!  Games happen to be worth over $200 easily.

 Of course it doesn't work, and Caps are likely the culprit.  I've done about 4 TE's and had success with 3 and a half, one of which I couldn't get the sound to go.. I think it was a bad OP Amp.
 
  Anyways, I replaced two of the 4 Sound Caps, the Backlight Caps and the Video Cap.  I still get no Sound, the backlight has returned with good contrast adjustment, but no Video either.  I replaced the Video Cap with a 4.7uf 50V instead of 35V, is that too much overvoltage? 

  The other question I have, is if other Caps are bad on the board, is there something that the Caps control which could cause the Game not to be read properly?  I'm hoping a full Cap overhaul will solve the issue, but not sure if the other Caps play a big role in the game being read properly.. thanks!

[MotherGunner]

See mod sticky section man.