Toshiba SD22VB - VCR+DVD player - Orion

[Turnip]

Hi Folks,

   Have one of these where machine reverts to S/by after a minute or so. Both VCR and DVD seem to function initially, reel drive assy is OK and tape ejects normally.
   Suspect power but there are no blown caps or signs of overheating.

   Any thoughts ?        -  Chris.