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Re: black square picture in the middle of the regular...
Make sure your closed-captioning is set to "off" or to "caption 1" in the setup. You have it set to one of its "text" modes right now, and what's happening is the caption decoder is blanking the screen where the text would go if there was any. You're probably noticing this on some channels but not all - it will only show up when the channel has closed-captioning being broadcast.
The v-chip locking is a separate problem. If you can provide the make and model of TV, I'll see if I can find how to reset the lock code.
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I bet the line is left to right in the middle of the screen!
This is a vertical circuit problem. The bumping tells me a solder connection/s on the output ic are broken loose or poorly soldered.
It is a chip (I will attach a photo of a typical chip--yours will not be exactly like it but you should be able to locate it).
The part in the photo has the generic number (LA...... which is one designed by Sanyo but used in many different sets) The chip will usually have between 7 and 13 pins.
All someone has to do (unplug set and remove cover) is take it apart, gain access to the main board (it may slide out or if open view of the bottom just turn set on its side after you locate the part---part should be fairly easy to find as it is always bolted to a small metal plate to cool it.
Take a good look at the pins from the bottom and resolder all of them.
9 out of ten times a 10 minute job.
if questions or need help let me know with a comment here.
Most RCA and GE TV sets use a four digit code to control the v-chip.
The code reset is different depending on the model. Try each number
until you find the one that works for you.
Hold down the
MENU button on the remote and VOLUME DOWN button on the TV it's self at
the same time for at least 4 seconds. The set won't say so, but the lock
will be unlocked
Hold down the 0 (zero) button on the remote
and the VOLUME DOWN button on the TV itself at the same time for at
least 4 seconds. The set won't say so, but the lock will be unlocked
down the MENU button on the front of the TV and the TV button on the
remote at the same time for at least 4 seconds. 4- Hold down GO BACK
button on the remote and MENU button on the front of the TV at the same
time for at least 4 seconds.
Hold down EJECT button on the
front of the TV set and the MENU button on the remote at the same time
for at least 4 seconds. Depending on the model, one of the methods
should unlock the V-chip. Now, if desired, you can change the settings
on the V-chip by going to the MENU and going to PARENTAL CONTROLS, or on
some sets, going to MENU and then going to TV SETUP, then to V-CHIP
Contact GE and see if they have a recall on it. Also, check the back for Brightness and Contrast and make sure they are not at 0 or below this will make the screen black. also, check to see if you have it to air/tv and not video/cable.
If it's old, it's most likely reached the end of it's working life. Some older sets had a 'service' switch for repairmen, when the switch was thrown it would produce the same effect as you describe.I wouldn't really call this a solution, but get a new one.
Sony is known for having problems with the picture tube. Sometimes it will blink on and off. also bad connections on the main board. A CRT restorer will sometimes help with picture tube problems but this must be done by a tech that has one.