Question about Toshiba TN50X81 50" Rear Projection Television

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I have a TN50X81 TV with no picture on any inputs

When I turn on the tv the screen will flash white for a second and I can see what input being used and the channel the tv is on, get full sound but no picture have called for a tech but by the time he comes to the house the picture start to work again. It will work for couple of months but then it will go out again.

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There is some shorttracking which didables some components from working temporarily creating this problem.

Posted on Dec 13, 2008

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Check all the cables and connection, ensure this is not just because of a broken contact in the cable.

Posted on Dec 13, 2008

  • Ginko
    Ginko Dec 13, 2008

    If the TV turns itself off completely, with no power and no led light, same as if the power cord was unplugged, then this is either a defective power cord or power adapter.

    If the TV goes on standby state and does not restart, then tv is on protect mode, and this happens when a fault is detected. This means that there is a defective component that is failing only under determined circumstances.

    If the AC networ is unstable, then that can be the cause for the TV goin off. In this case you restart the tv by leaving power cord unplugged for a while. this can also be tested by a technician.

    Call the technician the same and have the fault fixed, before the problem excalates and you get more damage to the TV set.

    If you are in case A, the technican will test power board, and easily spot and repair the fault, usually this kind of problem can be caused by a defective capacitor on power board.

    If you are in case b, it may be more difficult for the repairman to find the fault. This kind of faults are often caused by a faulty IC( for example defective convergence ICs) or a faulty component on one of the internal boards, and it is usually more difficult to locate the problem.


    If yo


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1 Answer

Screen stays blue and wont show the picture


TV may be on the wrong input and that will give you a blue screen. When you turn the TV on and the screen starts lighting up it should show on the screen what input the tv is on. If it is not on correct input change input with the TV remote or buttons on the tv. If it is on the correct input try a power cycle on the cable box, just unplug the cable box power cord for a few seconds and then plug it back in. If neither of these solve the problem describe how the cable box is connected to the tv.

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Turn on tv have sound and picture then screen turns blue no picture but have sound


Blue screens are a strong hint that your tv isn't picking up an image. Check to see if you have a firm connection on both your tv and your input device (cable box/ dvd player). You may want to disconnect and reconnect fully. Also attempt selecting other inputs. If you only have trouble with that one input, then you have a loose internal connection. Also make sure that your TV can display an image by trying to use the on screen controls.

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Howdy;
Since you don't have any white lines with the red screen/picture I would say that the red bulb (CRT) is conducting too much. There is an adjustment control for that. The 'sceen' control is behind the speaker cover and service cover. Turn red screen control slightly to the left until you get a good black and white picture.

Good Luck, Big Irish.

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1 Answer

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you need to adjust the screen voltage. behind the front grille and inside cover. a small black box 6 adjusters protruding from it. only adjust the the color counterclockwise that matches the problem in this case it's the green so look for the knob with "G" marked by it. there are 2 with "g" marked by them the row across the top of the box are for focus don't adjust. back the knob off untill the raster is blank with your input set to an inactive input, the picture should be blank and black.
when it is you have the adjuster close to where it should be, now change the input to an active signal and turn the color off so that you wil have black and white picture. adjust that knob untill you do have a truely black and white picture not too green or red or blue. go back to inactive video input and check that there are no lines of any color on the screen. repeat if needed. always adjust these knobs slowly the set will be watching you ! if your autofocus won't work now you have the adjustment set too low. check this function before putting back together again. these adjustments can be real touchy so be patient

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i have the same and i am having issues with the screen going dark when its suppposed to be a white screen and the picture is darker than it should be during normal watching of tv. also there is a line at the top(letterbox style) of about 1- 1 1/2 inches......anyone know how to fix this

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