Question about Hisense Televison & Video

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Hisense 46 inch TV. Works fine, but then gets hi pitched squeal,. And picture turns grey / green, turns itself off. Then back on, and continues this cycle

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The power supply could be failing. The hi pitched squeal is associated with failure.

Posted on Apr 30, 2017

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I have a 46 inch Hisense 4 years old. Has sound, no picture. took the back off and turned on with lights out and I could see lights


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Your Hisene TV has a display problem ,that is the LCD circuitry board has a problem .I suggest a LCD replacement .

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Samsung 46 inch LCD tv problem


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1 Answer

Why does my Samsung LED TV have sound but no picture?


Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/

Apr 30, 2014 | Samsung Televison & Video

1 Answer

Why does a grey screen and no picture appear when i turn on the tv??


Hello
You haven't given the exact model number to your Hisense TV here, so I assumes that your TV is a picture tube based one, and posts this solution. Your TV has some bad solderings at the video-IF section. Normally all TVs nowadays, this section will be composed with an integrated circuit [IC]. If you have skill in soldering techniqe, just open your TV, and resolder all the solder points of the main IC, which will be a large one, without making any solder bridge short in between adjecent solder terminals. The IC will heat up to an extent, and repeated heating and cooling may make solder terminals to get loose contacted. This is a common problem to almost all TVs irepective to which brand or model it will be.
The problem to your tV now, is with some loose solder terminals itself. OK.

Feb 02, 2012 | Televison & Video

1 Answer

After tv is on for approx 20-30 mins it starts to make a loud high pitched squeal or whine. once turned off for approx 10-15 mins can turn it back on for another 20-30 mins before squeal will return....


Sounds like a problem I had with a Polaroid t.v. Take the cover off the back and look for capactors that are buldging on the top. The top should be slightly concave. If they are convex at all, you can buy new one at Radio Shack and replace them for under $5.00

Apr 10, 2010 | Emerson EWF2004 20" TV

1 Answer

I have a 46 inch polaroid lcd tv that when you turn it on everything is fine but after about a minute it starts making a loud squealing noise,even if you mute it, but it will stop after about 15-20...


my 46'' inch tv polaroid lcd has been working fine for 3 years. today my wife and I noticed the tv is shutting off the screen will go black and the power light does switch to red. you can here something inside the t.v clicking but you can turn it on and it will start back fine for 20 minutes then shut off again? Does anybody know whats going out on the tv? let me know

Nov 16, 2009 | Polaroid Televison & Video

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