Re: Dead Vestel 17IPS20 power supply repair (OK fuse, no shorts)

thanks for that. i had a dead pp 17ips20 and there were no shorts or leakages on the o/p diodes. it was a 42!! walker. the fuse was ok and i had the vcc voltage going to the 3 chips in primary of pp..luckily i had a spare good panel to make comparisons and evetually i found a leakage on octocoupler u201 at top of board. there was also a bit of green mould around this opto which prob caused the fault, possibly a drop of water or beer, as it was from the local racecourse...cleaning this and fitting an octocoupler got...