vuduo locked

[g25]

hi all . ive had the red light problem, managed to fix this by changing the caps and regulators, box boots up fine and works ok but locks up anytime between a min or a few hours, by locks up i mean there is a pic on screen (frozen) no sound,unable to connect via ftp ,no response from remote control other than the green light on the box flashs but nothing happens the only way to resolve is to turn off and on again and then it will work fine for a while .tryed a known good psu still same problem.any help or ideas welcome thanks