Small vertical box shows in top right corner for a second then screen goes completely black again. power button flashes on and off red. I am not sure if my tv is a rear projection or a simple plama tv. It came with my house and is built into the wall. It is a 52 inch screen.
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Re: tv won't turn on
Unplugging overnight resets the TV. convergence ic are the most likely gone bad however it could also be that you lost power regulation....or you have what seems to be excess Hi Voltage or arcing
Now the regulator could be at fault or your SENSE line could be falsely
triggering due to a change in a resistor or zener diode or even a bad
sense line from your splitter... Convergence amp ic bad http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html http://www.hdtvoice.com/voice/showthread.php?t=28929
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The best and the only solution to fix this problem is to call a tech and get it serviced or if it is still under warranty just get it replaced.
Few troubleshooting steps you can try:
1)Do a hard reset by unpluging all the cords for 4hrs and then plug it back. 2)The
whacking test is to just bang or smack the set with your hand on the
back, side, top, etc., to see if there are loose connections or cold
solder joints inside that are acting up. If so, the banging should
knock them back to normal and the set should restore. You might have to
use some creative banging and some have had to put a book or magazine
under one corner to torque the chassis enough to get it to work
Goodluck, Please don't forget to rate the solution
It is usually a vertical deflection circuit problem. Here's the basic troubleshooting:
Make sure that no front panel buttons are inadvertently stuck in an "engaged" position.
Press MENU button. If a small horizontal line appears at the center of the screen, you have lost vertical sweep on your TV. The protection circuit shuts down the picture to protect the tubes from burning a line across them. The intermittent problem may indicate a loose solder. Try resoldering the vertical output IC. The IC along with the B+ feed resistor back in the sweep power supply is most probably bad or has a loose solder.
Press the DEVICE and MENU
buttons on the front panel simultaneously and hold it for 5 seconds to
activate the Error Code Operational Check. The status LED indicator
will then flash denoting a two digit code.
Count the number of flashes then pauses for about a
half second then flashes again. The first number of flashes indicates
the first digit of the error code and the second number of flashes
indicates the second digit of the code. For example, if the error code
is "24", the LED will flash 2 times, pauses, then flashes 4 times. The
error code is repeated a total of 5 times. Error 24 indicates a vertical deflection circuit failure.
Please let me know the code you'll and I'll tell you where the problem lies and how to fix it.
OK, much as I have reservations, let's try service mode. To enter service mode, you MUST have the original Sony remote. You need to press these buttons in order, with the TV off. You have about 2 or 3 seconds to complete the series of buttons. Press: Display #5 (the 5 on the number keypad) Vol + (volume up) power Then, after the screen is lit, press the "jump" carefully 3 times. If the word "penle appears in the upper left corner, the optical block is OK and it's probably a Q-box problem. It COULD also be the LVDS cable that sends the signal to the optical block. If you press anything else, IMMEDIATELY TURN THE TV OFF AND START AGAIN. The TV should reset to the original values.
Just to reset first before proceed another procedure;
Resetting the TV NOTE: Some TVs have a reset button. If available and accessible, try using the reset buttons before using the steps below. Using the reset buttons can save time. 1.Unplug the TV power cord from the power outlet for 4 - 6 hours. 2.Unplug any connected devices (DVD, Set-top boxes, etc...) 3.Press and hold the TV power button for five seconds. 4.Plug the TV power cord back into the power outlet and turn on the TV. 5.Open the on-screen menu to confirm that the TV is responding again. 6.Turn off the TV and reconnect the devices. 7.Turn on the TV.
I have a panasonic TH-42PX60U plasma TV. When I watch TV programing I have no problems, or with the DVD input. But if I switch to another input, be it video game (PS2) or vcr the screen sometimes goes black and the red power lcd light next to the power switch flashes. Holding the power button in for a few seconds will shut down the tv. Then I can turn it back on and it may operate normally again for a undetermined period of time, before the screen goes black again. This never happened when new. The tv is about 1 year old. Any ideas on this problem? Thanks Ernie
1. UNPLUG TV
2. HOLD IN VOLUME DOWN &INPUT buttons on TV
3. Plug in the TV. (the TV will turn itself on).
4. A blue "K" should now be showing on the TV screen, release the buttons.
5. Press and release the VOLUME DOWN & CHANNEL DOWN buttons simultaneously on the TV. (A blue service menu will appear on the screen).
6. Using the remote, press the DOWN SELECT button once. (The highlighted line should read INDUSTRY INT (+CAUSE) OFF
7. Using the remote, press VOLUME UP once (OFF changes to ON).
8. Press ENTER. After a few seconds the screen turns green and shows - Industry INIT success - at the top of the screen.
9. Unplug the AC cord for 10 seconds then plug back in.
Good Luck, big IRISH.
PS; I did not make this up... it's from SHARP> again good luck...you may have to do this several times....too...get the timming down.
I had the same exact problem.
I removed the bulb and cleaned it. There is a small screen at the top of the bulb and it was covered with dust. Once it was cleaned I replaced the bulb and it solved the problem.
Thanks to those who posted the solutions
yes there is a small black box with 6 controls on it, take off the bottom front of the tv, behind that you should find a black piece of plastic you can remove by taking out 2 more screws. the black box should be in the upper rhs.now i don't remember if the top 3 are the screen controls or the focus controls. the rows should be labled, you are looking for the screen control row. the green control is the middle one. you can try turning down the control till you no longer see the green lines. try adjusting in a dark room, it will be easier to see the lines & when they are gone. if you problem is not solved by trying this, then i agree with your tech & the green tube is bad. good luck.