techwood 42832 hd fault

[billy no mates]

hi
i hope someone could possible help me out
i was given a techwood 42832hd digital tv a few weeks ago
original fault was no power stuck in standby
changed all caps for new decent ones in power supply 17pw16-2 v2
and tv powered up with a white screen after being restarted a few times i got a normal screen with search for channels but with lines ripppling across the screen after so long these would freeze and the the screen would slowly fade until a completely white screen
power board has been checked and all voltages are stable e.g no fluctuating 24v supply solid at 24.4v as are all others
i was thinking t con board but thought id ask on here

thanks for any advice anyone can give on this in advance
 regards
billy

ps other boards are

17mb12-3 v2 main board
and auo T370xw02 vc ctrl bd (37T03-C00 ) t-con