Hi Sparky,
Gather you're quite young as telly bashers go - Not even 70+ where the real fun begins. Now can't quite hear customer, can't quite see the set, and when trying replace those 4mm square backlight screen Leds, the ancient hands shake a bit, and replacement Leds fall here and there.
Mind you, just sorted one only wasting two Leds - Bit chuffed, as made my entry sorting a Pye V14C line hold issue way back in the mid 50's.
It's history, but the V14c nearly caused Pye to fold, as no-one told the designer chap the set had issues, and needed a new PCF80 every two months, as his Flywheel synch design was crap.
Being a bit young at the time, ripped out the flywheel in favour of triggered synch favoured by Decca in the DM4c with a nice ECC82.
Only got away with it, as 14 inch sets were the biz, and few folks noticed the alternate field scan didn't quite line up - Great days - Chris.
As to Amstrad and Pinnicle - Both crap but gave us a chuckle