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I have a Polaroid model TLX 04240B tv that works great for about 20 minutes then the screen goes black, if I turn the set off and back on it works for about 4 minutes before doing this again. Any advice?
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That indicates that it could have a power supply problem or a back light power problem. Some part is working when cold then failing when warm. You need to check to see if it is just the back light. With it on and after it goes dark see if you can make out a ghost like image on the screen. You will have to get quite close and near the edges to start to see any images. If you can see this and it is a moving image ie the tv i still on but just no bright display then it is your back light and most likely the back light power board. If it is actually shutting right off then it is your main power.
If it is the back light and the board is a separate piece on that model the part should be $40 to about $75 If it is the main power then you could be looking at $150 ish for a separate power module but if it is on the main board then you are talking about more money than a new tv. Both would be covered under warranty so check to see if you are covered. You can get the parts from any of several on line stores. Just do a search for Polaroid TLX repair parts. These should be cheaper than getting them from a dealer or repair depot if they are available.
Buy another HDMI cable.Try another HDMI cable with another HDMI hub on the tv port.If u still have the same problems,mean the whole main tv Tuner signal board have problems and the caused.Tries websites like Shopjimmy.com,Ebay.com to buy a whole new refurbish tv Tuner signal board for the replacement.
open the black plastic panel and the aluminum panel which has 3 screws each in the back of the tv. look at bottom left corner of top board. to the right of the red led light, there's these four white small switches. turn the bottom two switches to "on" and tv should be working. It's very simple to fix the problem to everyone. My tv capacitor was not the problem. I hope this will help everybody.
I have read everything I can find on the net about this problem for Polaroid TLX 04240b TVs (most, like mine, bought from Wal-Mart on Black Friday after Thanksgiving). I thought I was on a hot lead when I changed a 220uF 450v capacitor, but I still had the same problem. I saw a short post from somewhere else on this Fixya web site (sometimes I can find it again and sometimes I have trouble locating it) that said someone flipped a tiny switch on their circuit board and the problem was gone. I did the same thing and my set has been working fine. They had said their set was on for over 8 hours two days in a row when they posted.The other night my daughter left our set on over night for 20 hours and the picture still was working great.If you look through the top of the set when the picture is on you can see some white light at several locations, when the screen goes blank the white lights go out and a red LED light can be seen. If you take off the plastic cover on the back (3 screws) and then take off the metal cover (3 screws) this red LED light is on the upper circuit board in the lower left corner. Just a little to the right of the LED light is a small switch block that has 4 tiny white switches. I turned my set off and took the bottom switch (#4 and had the letters BURN by it) to the right "ON" position, turned the set back on and, so far so good. PLEASE NOTE!!! I know almost nothing about how transistor circuits work. I have no idea what the switches do or what long term effect this might have on the set. The set was only good as a paper weight before so even if this only fixes the set for a short time it was at least worth a try for me. Does anyone know what those switches are supposed to be for????
I'm very appreciate to jranada's solution, my tv gets new life.
It's very simple to fix the problem to everyone.
My tv capacitor was not the problem.
I hope this will help everybody.
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