Hitachi 42hyt42u..picture goes dark on the right side if I switch off then on again it goes ok again for about 20 before the right side goes dark again any ideas.?

SOURCE: Hitachi Ultravision Digital TV dark picture

Looks like

1. A Cold solder in the Video Output stage power supply.

2. A bad Electrolytic Capacitor in the above Video Output stage.

I generally do not waste time in attempting to locate faulty capacitors. There will be only 6-8 pf them in the above stage / section,m and the klot of them would collectivelyt not cost more than 3-4 $ equivalent, in india. Just blindly replace the lot, and the set is ready in 30 mins.

Dunno how much they will cost in your country. Try to look for a 100mfd, 160V Capacitor. Close your eyes and replace. generally does the trick.

SOURCE: Hitachi 32'' lcd tv picture runs slow sometime and goes dark

go in touch wit HITACHI costumer help and service and tell them ur problem u have.....how old is ur TV?
hope u get a answer from hitachi....and good luck

SOURCE: 42edt41a hitachi plasma tv went dark sound ok

sounds like your y and z drive boards over heated and need replacing...

SOURCE: Left Side of Screen goes semi dark

That Probaly Means Your ******* Kid Jerked Off All Over The Monitor *******

SOURCE: dynex 32" tv picture goes black

If there is still about ? 24. Volts coming from the Power Board when it goes dark, it will be the Inverter board that needs replacing. If not, it is the Power Board that needs replacing. The Voltages should be written next to the sockets & plugs on the Power Board.