Question about Hitachi 50UX57B 50" Rear Projection Television

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TV'S PICTURE WILL BINK OFF WITH TH EPOWER LIGHT STILL ON. IF I UNPLUGGE IT IT WILL RESET. IT WILL ALSO RESET SOMETIMES IF YOU TAP ON IT??? WHY??? ANY HELP?

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ZMAN, if tapping the set makes the picture return you have broken solder connections on one of your boards, as the set warrms up the boards expand pulling on the connections, you probably only have a couple of bad ones, call a tv shop and have them solder it up for you, this is not a high dollar repair, good luck, BMW Rider

Posted on Jan 05, 2008

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Posted on Jan 02, 2017

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1 Answer

Why tv shuts off by itself?


Dear User,
People who have faced such problems have tried sticking th epower plug (Going into the TV) a little harder and the thing never went off again.

If this is not the case, then it could be the cat5 network cable. Try keeping it out and observe.
Let us know further
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Th epower will come on but no picture


Short circuited component/s at its main board. Contact any service technician. Gopakumar Gopalan Google

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I have an acer AT3220 lcd tv i had problems turning it on now it just shows a red light wont turn on at all any ideas ie which capacitor or any other information would be brill as im now back to a 28inch...


Open the back of the tv check th epower supply for busted/leaking or swollen capacitors - if you have experience solder some new ones in place - use the 105degress one for a longer lasting capacitor - the radio shack ones will work but they are rated at 85 degrees and wont last as long.

thanks,
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Mar 31, 2011 | Acer Televison & Video

1 Answer

I UNPLUGGE MY TV FOR 2 DAYS AND PLUGGE IT ON BACK


If the TV goes in standby, then it is in protection mode.

Ensure also that the fault is not coming from a faulty receiver box sending
bad signal, check if you get same problem on DVD with no receiver box
connected.

Try first leaving the TV power cord unplugged for some times, let say one hour or so.

The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible causes.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , starting the flashing light.

If you are in situation one, then the TV will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

If you want to DIY you find parts here,

All: Appliance parts, electronics parts & more from PartStore.com

Encompass Parts Distribution

LCD/Plasma Electronic Replacement Parts: Plasma & LCD TVs, Appliances |


On LCD Pay particular attention at inverter and power board, power board can be inspected looking for bulged or leaking capacitors, then tested with a multimeter. The inverter is more difficult to test , there is need to read voltages, should be done by a tech. Also the LCD controller board can cause same problem

On Plasma, test Sustain (Ysus/Zsus) / Buffer boards , cables to plasma, digital board and power board.

On Rear Projection : check lamp, lamp ballast, power board, and convergence.

On CRT TVs, check ballast , flyback transformer, CRT, Tuner, Convergence.

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My tv won't stay on


check all the fuses on all the boards there are about 7 of them

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Panasonic prism ptm4597s


Youre going to need a service manual and some trouble shooting skills for this.type of problem. The manual is available at the following link. http://www.servicemanuals.net/

Jan 03, 2008 | Televison & Video

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