Question about Toshiba 57H83 57" Rear Projection HDTV

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No audio or video

Power led turn on ,heard relay clicking on the back but no sound or video.

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The relay is kickking in but a failure in one of the boards is preventing the tv from powering up (protection circut ) and only qualified service centers have access to these parts

Posted on Oct 17, 2008

  • jason Oct 25, 2008

    well your not getting any more help now

  • jason Oct 25, 2008

    you have to say something or I can't help

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Kenwood A722L no sound and volume led blinking


This could be due to a faulty speaker relay (if your unit uses one). Normally, the unit will "wait" a couple of seconds after you turn the unit on. Then you will hear a "click" and the sound will begin coming through the speakers. If the relay is faulty, it would cause the problem you describe.

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The clicking is the relay the set uses--likely bad filter caps in power supply and here is what to look for:


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No picture sound only


Very likely that one or more of the 3300μF (10v) capacitors in your power supply have failed and require replacement. If you're proficient with a soldering iron and other tools, it should be an easy fix -- less then $10.

I had this exact same problem recently (no video, only sound), and when it was happening, initially turning the unit off and back on resolved it. This subsequently (within a few days) developed into a problem where the TV wouldn't turn on at all (try to turn on and LED would turn green and relay would click, but a second later the LED would turn back red and another click would be heard). It would require 50-75 "power-on" attempts before the TV would stay on, and even if it did, sometimes there was no video. Finally (a few days after that), my wife heard a "pop" (she called it a mini-explosion) while the TV was on, and then she lost video/audio altogether. The TV wouldn't power on at all anymore -- it became stuck in a cycle where the relay would just click on and off until unplugged.

All of these could be traced back to some blown capacitors in the power supply module. On my 50PC5D, there were 6 caps, all 3300μF, 10V, 105°C. Five were clustered together, and one was on its own, but all 6 had split open at the top and leaked out electrolytic solution (fortunately due to location/orientation, no damage resulted within surrounding components). I replaced all 6, and now the TV is working like new again.

New capacitors at a local electronics supplier were about $1 apiece, so it was slightly more than $6 to replace them all. I would definitely recommend inspecting all caps in the power supply (there aren't that many... maybe a dozen or so)... if they're bulging even slightly, just replace them while everything is opened up.

I don't recommend buying a "repair kit" from eBay or the likes, since many of these contain insufficient parts and tend to be over-priced (e.g. I ordered a "kit" for my specific board for $25+S/H that included 4 caps, 2 FETs, and a fuse, but it would not have been sufficient by itself (needed 6 caps), plus the FETs and fuse were fine; in my case the TV died completely before the kit arrived in the mail, so I went about sourcing the parts locally). I thought I was taking the easy way by pre-ordering parts while the TV was still semi-working, since the TV was wall-mounted and I didn't want to take it down; however, I wish I had just pulled it and identified the parts needing replacement.

Good luck!
CalgaryBen

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1 Answer

I have a hitachi 65SWX20B projection TV. When I power it on, I get no picture, no sound, and on one of the circuit boards, an LED (D967) blinks dimly (1/2 second on, 1/2 second off). A soft click is...


If the board with the blinking LED has larger than average parts on it, it is likely the main power supply and the clicking may be from a relay that is connecting and then, disconnecting the AC. With no video or audio, the main power supply has likely failed. Contact Hitachi service to ask how much the repair or replacement cost of the supply is. Make sure you have all involved model numbers handy; the one from your set with the mfr. date if present and if you can find an assembly number on the power supply itself. it may save you time and errors. These boards are often simply plugged into other assemblies with dissimilar plugs but if you decide to DIY, take some snapshots of the cabling to be on the safe side.

Mar 11, 2011 | Hitachi 65SWX20B 65" Rear Projection...

1 Answer

I don't get any front display or any sound when turned on.


Do you hear any clicks? If not, the standby transformer or related circuitry is bad. If you hear 1 relay click...the audio output section is most likely the problem. The first click you hear is the main power relay...and should see display.. the second relay click is the protection circuit relay engaging to let audio to your speakers...if the second click is not heard (it should occur in 3 to 5 seconds) there are shorted output transistors or a shorted output IC trying to blow your speakers with 50 to 75 volts dc. The protection circuit monitors the speaker lines for voltage. They should always read milli-volts only...not even 1 volt.Anyway, good luck

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1 Answer

No picture on my philips 42PF7321D/37


Bad caps in the power supply must be replaced .

Jul 21, 2009 | Philips 42PF7320A 42 in. Plasma HDTV

1 Answer

Startup Problem with my 42pf7321d/37 Phillips plasma TV


I need to know how long do you have the tv?In the other word,approx. how many hours you have put into it?
Secondly,did you wall mounted the tv or setting it close the the area which there is not much room for the back of your tv to breath?
solutiondoct

Nov 06, 2008 | Televison & Video

1 Answer

Toshiba 57h83 wont do nothing


that relay is supposed to engage power to the tv boards that control the screen.
you will have to take it to a oualified service center , because they have access to parts that are needed for repair

Oct 17, 2008 | Toshiba 57H83 57" Rear Projection HDTV

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