how to repair easily national Tc 2001 TV protection on fault

1: it has protection board near the vertical ic.
2: remove the three transistors and replace.
3: two tr are npn one is pnp easy locate there.
.4:some TV hasn't no external protection board ,three transistors in motherboard near the vertical ic
5:you can follow the step 2 and step 3 good luck.
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How to repair dvd player ,No disk fault

1).check the lazer pick up is clear from dust.If yes clean the lens carefully.If no goto (2).
2)Check the pick up ribbon  cable if bad ,replace it.
3)If doesn't work replace tray motor.then OK.