Scattered black lines appear then screen gos black, but still have good volume
Sometimes it may take a few minutes to turn black and other times when you turn on the tv it will never show the video, but audio is fine. I can slap the left side of the tv and picture will almost always come back on. Volume bar is visable when adjusting volume and mute symbol will appear. Sometimes it will alternate back and forth without doing anything and then it will stay black, then I give up. Unit is about 9yrs. old. I also performed the auto convergence. Picture looks great when it comes up. Please Help!!
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Re: Scattered black lines appear then screen gos black,...
You have actually diagnosed your own problem, Let me explain; the line "I can slap the left side of the tv and picture will almost always come back on" This indicate some form of poor connection (cold solder joint). If you have a soldering iron, solder (circuit type not pipe type), and a multimeter. Use the soldering iron and solder to redo the cold solder joints , and then test it (the connection) with the multimeter.
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The key here is you have to unplug it---it means the problem is related to the microprocessor which may become confused because of an issue elsewhere in the set---no real easy answer except it may be expensive to locate and fix.
your dlp ic is going bad and needs nto be replaced. some of the mirrors are getting stuck they will appear as black dots or white dots. it usually starts as one or two and will continue to get worse over time.
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 problem with our VS-55705 Mitsubishi. It seemed to me that this was a problem of heat.
I unplugged the TV and then took the cover off of the back of the it. I then used canned air to blow off the collection of dust from the components. Then I vacuumed as close to everything as I could without touching any of the components. I then used glass cleaner to clean up the surface of the three bulbs.
I plugged in the TV and it has worked perfect ever since. I haven't put the rear cover back on it yet. That could have been all that I needed to do to fix it. I'm too busy enjoying a nice picture to try putting it back on. Cleaning the bulbs really helped the quality of the picture.
The red line in the crt is the sreen voltage is to high or bad tube.
A simple fix is if you take off the front panel there will be a black box be careful it is high voltage make sure you are a pro.
there will be six controls look for the one marked screen and is for red tube adjust very slightly counter clockwise.until red
line gos away. If that does not fix it its the red tube.
Try goeing into your Menu and see if you have the closed Caption on
that will produce a black box on the screen if you have the owners manual look in there,if you don't have it you can go on line and download it from the manufactures website under Downloads
Good luck Walter Grzybowski