Nothing wrong with swapping whole boards if its a viable option. Sometimes its more cost/time effective to do so and you can always go back and dig the scrap board out later if you have time for it. I definitely prefer having the options of repair or replace at my disposal.
It's nice to have the option, but now it's common practice for manufacturers to not even make the circuit diagrams available, so you're working very much in the dark.
But cost is the main factor - "Yes Mrs. Smith, we've repaired your £500 TV for you, that will be £728.64, thank you"
Essentially you do warranty repairs now, and once it's out of warranty throw it away and buy a new one.
As a Sony service agent I replaced
MANY LCD panels over the years (it's by
FAR the most common failure on a decent make LCD TV), and sometimes I even replaced them out of warranty, as some Sony LCD panels were quite reasonably priced. However,since a few years ago they no longer supply LCD panels, either in or out of warranty - instead they supply an exchange TV (either the same model, or a later similar spec model) if the LCD fails - it's called AES (Advanced Exchange Scheme). Under warranty it's obviously free to the customer, but out of warranty it's a 'special' price - so 'special' that it's more than the original cost of the TV was.
So again, once out of warranty, throw it away.
I'm quite pleased to be out of the TV game, less hassle now, less hours, less money (but enough for my needs) and plenty of fun with electronics
I even went in to work yesterday, and did a few
unpaid hours.
I'm expecting some new PCB's tomorrow from JLC PCB - they cleared UK customs early hours of this morning, and while scheduled for Tuesday they should arrive Monday morning, unless there's some kind of hold up.