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what it is the tvs like this are mento be serviced every 3 years or so the convergence settings are in the back only user ones are in the settings dont try this yourself though i broke mine lol it will cost 120 pounds tops to fix dont worry its worth it if this has helped please give me thumbs up because people are just taking answers and not voting
This is a chassis PTK195 and acommon fault with these sets, that causes the symptom you describe, is the flyback transformer goes bad.
If you're at all familiar with electronic repair you could start checking there (and horizontal output transistor shorts). If not have an RCA approved warrany repairer give you an estimate/service call.
Note: the good thing about these sets is the chassis is very common and easily removed for service (without bringing in the whole set.) .
Usual cost to repair flyback/ dead set symptoms $200-$350.
one of the 3 crts are defective.most of the time it is the blue crt.remove the front speaker grille.first disconnect the blue crt board from the blue crt.
try turning on the tv .it will come on if defective.also visually examine the
blue crt board for hair line small cracks.repeat this procedure with the
other crts until you find which crt and or board is defective.
Ck capacitor cp150 2200uf 16 volts if bad 2 more in same circuit also needs to be replaced 220uf 35v.ck second ribbon connector on deflection board make sure it is in correctly,or set will not come on.