i was trained to diagnose/repair down to component level , but these days engineers are basically board swappers due to the size/cheapness of mass producted components
Being trained to component level without circuit diagrams these days is no longer posssible without diagnostic equipment as well.
Switch mode power supplies are usually the items that break down first.
The only way for the home "mechanic/technician" is if you have the same tv and as Briggie says, board swap until you find the faulty sub component.
When buying electronic equipment it could be a good idea to buy two of the same unit, then you have a source of components when both fail.
These days the product you buy today is already obsolete, newer models are already in production.
Modern electronics is not made to be pulled apart any more.
When was the last time you replaced a kettle element, or an element for an electric iron? When a kettle costs £5 would you want to?
When a TV sells for £200, the retailer probably gets it for say £70-£100
There are inport duties to pay, development costs, shipping etc.
The actual "cost" including all components, Labour, packaging is probably in the region of £20-£30
I worked for a company years ago that made electronic equipment.
A high street retailer sold it for £15 we sold it to them for less than £5, the actual cost to us was £0.80. Every one was happy with the sale. Warrenty no questions asked, replace and skip the old one. Even the phone call to discuss the warrenty would be more than the item cost.:nenau
As engineers if we could save the cost of a resistor per unit it was cost effective since you made 10,000+ units.
Throw away society, and it is our fault, we choose to buy the cheapest, just have a look where they were made.
Even if you find an item made in UK, it probably says.. " Assembled in UK" from clip together components. Many items now have "Made in Europe"
Non of this can help the "Balance of Payments" for the UK
