DIY TV repairs?

[presta]

he started poking and prodding inside it with a kitchen knife

If you're working on safe low voltage equipment you can sometimes learn quite a lot about what's going on by prodding around with a finger, or my tool of choice: a scalpel. Depending on whether it has an effect when it shouldn't, or no effect when it should, you can home in on where the problem is quite quickly. (But don't try it if you don't know what's safe and what isn't, obvs.)

 

[Alex321]

If you're working on safe low voltage equipment you can sometimes learn quite a lot about what's going on by prodding around with a finger, or my tool of choice: a scalpel. Depending on whether it has an effect when it shouldn't, or no effect when it should, you can home in on where the problem is quite quickly. (But don't try it if you don't know what's safe and what isn't, obvs.)

I'm not sure the insides of a CRT television really classed as "safe low voltage equipment"