Question about Hitachi 50GX30B 50". Rear Projection Television

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Problemith 50gx30b 50GX30B wont start up, After turning on power the power light comes onfor a breif second or two and then shuts back down before picture or sound has a chance to activate. Before this happened: the Hitachi 50GX30B would shut it self down, once in a great while (once or twice a week with daily 5 hr use)

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Posted on Dec 23, 2008


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I have a 50gx30b projection TV. I turn it on it sounds like its trying to power on but then it goes off. Then other times I turn it on and it comes on for a few minutes then it shuts off.

You need to replace both of the STK ICs ,they are Big Black ICs and will have Part number on them example STK392-570.
Mats Eletronics has ICs 1-800-628-1118
You will also need to check all of the small ohm resistors near the ICs.

Jun 26, 2011 | Hitachi 50GX30B 50". Rear Projection...

1 Answer

My hitachi will not power on when clicking the power button it comes on for a second or less and immediately clicks off

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.


Nov 26, 2010 | Hitachi 50GX30B 50". Rear Projection...

1 Answer

Tv keeps turning off

There should be a sequence of lights flashing before it shuts down. Either the lamp(s) burning out, or there is a temperature issue. Do the lamps even strike...turn on that is?

Jul 01, 2010 | Hitachi 50GX30B 50". Rear Projection...

1 Answer

Turning my tv on

do you hear any high voltage from the tripler?probably bad voltage regulator ic and bad conn. in horiz. output circut

May 05, 2010 | Hitachi 50GX30B 50". Rear Projection...

1 Answer


Sounds like the convergence board, try replacing the STK voltage regulators and any resistors that may burned or discolored. This problem is causing the power supply to shut down probably.

Mar 13, 2010 | Hitachi 50GX30B 50". Rear Projection...

1 Answer


U know how to solders right?Tries Websites Tv repair, to buy a convergence kit to repair it ur self.Make sure to ground ur self with a wire strap,before desoldering and soldering in the cold.It more stactics reaction,when it to cold or hot will short out the ICS,because ICS are very sensitive statics electricity.

Feb 25, 2010 | Hitachi 50GX30B 50". Rear Projection...

1 Answer

Hitachi 50gx30B Pincushion problem

Please let me know in which direction the picture is distorted. Does it bow in from the top and bottom or left and right?


Mar 06, 2009 | Hitachi 50GX30B 50". Rear Projection...

1 Answer

Tv wont show picture

Got a new tv and didn't pay any online service for a "solution"!

Jan 09, 2009 | Hitachi 50GX30B 50". Rear Projection...

1 Answer

Hatachi 50GX30B

I dont have a clue what your symptoms were, you have to keep responding to the origional post or I have no way to determine any previously posted items for your problem.

Jul 22, 2008 | Hitachi 50GX30B 50". Rear Projection...

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