Pulsating power LED. No picture. No sound

Some Hitachi models have a known issue that cause what you deswcribe. Check the site www.TvRepairKits.com for your model number and see if they have a kit,

Because something in it failed.

Are you getting the red led light? If not, please check the power outlet for any loose contacts. Try the TV on some other power outlet. If the TV does not work still, cool it off for 48 hours, after removing the plug and retry.

GOOD question and well asked----Start at the beginning.

if light on main fuse is good---do you hear the power relay click on and off?

These sets for trouble shooting use a number of green and one red LED inside on the board--the red one should be on when power is connected and the others at turn on all should light--if do this with back off look for the Green ones---when set turned on do all light and then go out--look for one that goes out first or last---each is connected to a specific voltage coming out of the power supply---they will lead you to the area where the trouble is---this set is old enough you may be able to find a service manual online.

I have fixed a lot--going to need a volt/ohm meter for any real tests.

I am ready to help if you need it.

because you didn't have Picture for this broke led.Please check More details of that on led website. LED COB module Epistar high power integrated LED LED controllers dimmers...

First if the model number is right here: When the red light is on about 80% of the set inside is powered up and running all out.

On these sets if you turn it off and the red light does not go out one of the relays on the power board is engaged or stuck in the closed position.

If I remember this model it has three black rectangular plastic relays on the power supply board(follow power cord into the set to see if this is the case.)

Relays have voltage and type marked on top (like 12 vdc etc).

Carefully with back removed what I would do is with something NOT metal tap on each relay until (with set turned off) the red light goes out.

That is the bad relay----if set has 3 I usually replace all as only 4 solder connections each and they are not real expensive.

I saw one of these sets where the customer had been gone for a month and when she returned set appeared to be off but Red light for power was on.

The set was so hot I tapped on the relays and then when I knew which was bad shut the set off and unplugged it to let it cool off.

I am saying if you leave the set plugged in and the red light is on There is the chance it may overheat to the point where you could have a fire.

Let me know if you have questions.

SD TECH

When u turn the tv on,u hear alot of clicking?That mean the Ballast that help the projection bulb to work is dead.Change the Ballast,might as well change the bulb too.U don't know what is the condition of the projection bulb in.

The 392-150 is a higher current device then the 110---you can use either--this is normal in the hitachi sets---I usually replace both with 150's---check the led that does not light---should indicate which voltage source is bad---if it is one of the 2 voltages for the convergence ic's(one is a positive and the other a negative voltage) then the convergence Ic's may be bad---look for any discolored resistors around the ic's---one way to tell if it is a convergence ic is to de-solder both ic's and see if the set turns on(the convergence will be out the window) but if it comes on change both and do the alignments with the Hitachi remote. By the way----the led should have a location number printed on the top of the circuit board.

My had the same problem, red light on bule led on but no sound or picture ...can any one help??? I appreciate

Do you have a DLP or Plasma set????? Give me the model #.