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I have a SONY KV-29 X5D standard (CRT) TV set, who lately started presenting the following symptom: As soon as I switch it on, the red led is blinking, the audio comes normally out, but the screen is completely black. When I shake or hit the set slightly, the picture appears normally. Also, if I keep the set at a certain angle (usually with the CRT facing slightly towards the floor, the picture is there also!.... But if I leave the set to rest at its normal position, the picture goes off again!... I am an Electrical Engineer, but without any involvement and experience on CRTs, so I can't figure out where to focus in order to deal with this failure.... Could somebody help please? Thanks, Thomas

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Hi Thomas, being an electrical engineer, why don't you understand the fault is due to some loose contact inside the RV? Very shame indeed. Look for that.
google.com/+GopakumarGopalan
http://electronicshelponline.blogspot.com/

Posted on Mar 27, 2017

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SOURCE: TV image goes black, red light keeps flashing - hitting sometimes helps recover

you most have a cold solder but wachtout dont foolaround with tv sets they are very dangerous to a person that have no experiences with it and you could produce a larger damage..good luck...

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object in the picture look small,tiny and elongated especially when viewed from certain angles.Worse,the picture seems to have a horinzontal bend towards the bottom of the tv screen it is due to malfunctioning due to technical defects in TV. YES the problem is in vertical output section of your TV. IT is due to some electrolytic capacitor failure in tv. if it is replaced by the same value as it is your problem will be solved. hope this will help. good luck. it is a common problem & not major.

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SOURCE: Panasonic Viera TH-42PV7HS Plasma keeps shutting down

Hi to all, My 42" Panasonic plasma have the same problem. It turned itself off and now red light flashes 7 times, than after short pause 7 times again. And so on. Any ideas what is wrong??

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SOURCE: TV will not turn on/black screen/picture/green LED is red/blinkin

I had the same problem for my TV which was model number: 42PF9631D/37 and I went to get the software update at http://www.p4c.philips.com. Type in your model number, then click on the right model. Then click on software & drivers in the left column. Then download the correct software update to a flash drive. The flash drive must be completely empty except for this file. Then unplug your TV, and plug the flash drive into the USB port. Plug your tv back in, and the software update will upload. It fixed my TV instantly.

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Fault in HZ Deflection Stage check yoke also

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