Question about Panasonic PT-51HX41 51" Rear Projection Television

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No video, No sound, TV pops when you turn it on!?

The TV makes a sparking noise when you turn it on. It osunds like something is shorting.

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Re: No video, No sound, TV pops when you turn it on!?

You have high voltage arcing taking place ,poss tubes or flyback,splitter assy,focus block, you must try to pin point where or by what the arcing is taking place,safety first. unplug the unit and inspect for black burn spots on or near metal parts.

Posted on Nov 16, 2007

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hello. it sounds like you have a couple of thing wrong.!!! one there is a bad fly back transformer.!!! that's arking on to part of the mother board.!!! that's the sparking sound you hear.!!! two is that you have a BAD GREEN CTR GUN.!!! THAT MIGHT BE WHERE THE FLY BACK IS ARKING ON.!!! THAT'S WHAT MAKE'S THE SCREEN GREEN.!!! IT'S SHORTING THE GREEN CTR GUN OUT .!!! & WHAT EVER YOU DO .!!!! DO NOT TRY TO SEE WHERE IT SHORTING FROM !!!.THE HIGH VOLTAGE FROM THE FLY BACK TRANSFORMER .!!! IS NO JOKE.!!! IT CAN KILL.!!! OR PUT IN THE HOSPITAL.!!! THIS IS NO JOKE.!!! SO LEAVE IT TO A SERVICE REPAIR MAN.!!! PLEASE .!!!THANK YOU.!!! "GOOD LUCK"

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try replacing the stk's on the deflection board (making sure that all of the resistors on the board are OK and that there are no solder cracks I found one of the jumpers had a bad solder joint on the one I worked on) but if that doesn't fix I have some raw research that might give you somewhere to start :
No. The CRT driver ICs are prone to shorting and cause this symptom (I just had one with those very symptoms and the green CRT driver IC was shorted). Disconnecting the CRT board does not clear the short on the board. Often then is a small burn mark on the CRT board under the affected IC (but not always). The IC should be a TDA6111Q. Be sure to note the proper position
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Larry, Check the CRT driver ICs on each of the CRT boards.
Bob Waterman, CET® #RI-28
Master Technician License #9109
Service Manager / Parts Manager
Gemini Computer, TV, & Security Alarms
(508)695-7769 FAX
Hi Guys, I don`t see many JVC`s and don`t have the print for this AV48WP30, went out this morning and as customer claimed on phone when you plug set in and turn on it makes a loud thump thump in both speakers 20-30 times then relay clicks, the thump stops, and blue idiot light on front goes dim/bright, dim/bright, have to unplug set to start this same scenario over again. Never develops HV or audio, Will order the service manual today, but would like to know if anyone has seen this before (should say "heard" this before)
I would disconnect each crt board and hv lead one at a time and try. Have seen several bad tubes on that model. The only other problem I have seen on that set is bad convergence amps, however that doesn't cause shutdown.
Perry Bower
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From Tech Repair CD:
JVC\AV48WP74\just went click*click*click when turned on Video drive IC (IC1101) on the red CRT module
shorted. It looked like bad solder on the B+ was the cause

Frequently Used Top Five Repair Parts by symptom code
Above from JVC Web site, also I have seen shorted video drive IC's on the crt boards short and cause this symptom. Try unplugging the 200 volt source to the crt boards and see it the set powers up and stays on. There is a B+ relay which supplies 130 Volts to the horizontal output circuit. Is this relay energizing? I takes about five seconds after the power is turned on for it to energize. If a short is detected on the 130 volt line the blue power lamp on the front will do what you describe and the relay will pulse on and off. (David)

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SB connector
5. Power on the unit
6. Unplug the unit and remove the shorting pin or the jumper
7. Re-attach the unit’s rear cover
8. Power on the unit, and input the digital source

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