The power supply in our older hitachi 50es1b television it bad, when it turns on it clicks but ntn i plugged it out for a month and turned it back on and it worked now since it's been plugged in the problem is back how do you clean the television

Tries tv unplug,replug it back like about an hour later.By letting the tv restting itself back to the factory setting.Now tv should be working again.If it have the same result.Yes,the power supply board is the problems and the causes.That the board,where the power a/c cord plug into it.Try website like Ebay.com to buy a whole refurbish power supply board for the replacement.

I have worked on a lot of these sets and in fact own one almost identical to yours. The shut off means either a "shut down" circuit is being engaged because of a problem somewhere in the set OR you may have the same problem mine had---here is what I did.

I plugged the set into a outlet controlled by a wall switch: turn set on and it shuts off, turn wall switch off for a second and back on and try turn set on.

In my case sometimes had to do this many times but eventually the set would come on. In my case problem turned out to be bad capacitor near the main power relay, that is the click you hear when try turn set on----if it will not come on after say 20 tries it is bad part most likely in power supply or even bad solder connections that develop after age in many set.

Let me know what you find and IF ANY QUESTIONS feel free to comment here and the site will email me so I can assist you.

SD TECH

I have similar problem with my 42hds69. What I did is unplug the tv and remove the cover and vacuum everything especially the fan and remove the power supply board and brush/vacuum the back side... careful about static so hold the metal frame while you're vacuuming. Reassemble everything... mine worked... and still working... Good luck.

It could either be a fuse inside the tv near the power supply board or the power supply board is bad.

try turning off main switch and unplug set then replug in wait 30 sec turn on main power and repeat then try if it works great if not power supply bad. i also suggest a ups universal power supply newer tvs sensitive to surges and brownouts also never turn tv off n on in short period of time will cause surge that trips protection circuit

Replace micro fuse F903 (5amp). It's located near the biggest 2 caps. in power supply area.

Hello,

I would try to re-seat the lamp. Pull the lamp out, check it to see if it may have gone bad again, then put it back in to make sure the contacts are connected. Before applying power, unplug the TV for 5 minute, and then plug in/turn it on.

Most lamps, if bad from the factory, will go out within 3 months of use. It does happen, and happens more often than you would think.

Try this, and see what happens. Good luck.

Convergence amp ic's bad

http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Good Day,
If TV wont turn on check Q912, Q913 & I901. If no click of relay Check Q003, als chech the Convergence IC's.
Good Luck, big IRISH.

I have the same problem with mine. i,m pretty sure that it is the built in surge protector is bad. Try unplugging the tv for 30 seconds then plug it back in and turn it on. If your surge protector has not completely gone bad this might work a few times. mine won't turn on at all anymore.