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Sony plasma tv was working fine, now there is a large black strip going from the top of the screen to the bottom, about six inches long, where it only displays a black strip.

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Post your problem in the right category with your model listed if the category doesn't already exist, so you can get relevant feedback.  As it is, clearly your TV got its connection along that column interrupted; carefully seek to clean and dry whatever fluid fell down the screen into the interface....

Posted on Jul 22, 2008

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Plasma tv has a 2 inch black line running vertical in the screen what is wrong?


Break off the round grounding pin on the end of your plug :) this worked for me a few years ago

Jan 20, 2013 | Computers & Internet

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Trying to put on closed caption on gateway tv 42 inch-a large black screen appears


don't know if CC can be used when watching a DVD. seems to me that it would cause a conflict on the display where the dvd is sending the image which is really not part of the TVs input control options.
CC is usually related to the digital signal from signal broadcasts and not video images coming from an external source. if it was controlled i would think it would be from the dvd remote controller. not the tv.

Oct 14, 2012 | Gateway FMC-901 w/ 42-inch Plasma TV...

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When i turn on my computer the screen stays black as if it's off however, the computer is working fine. Sometime it flashes on but the goes back to black.


I suggest that your computer isn't working fine, it just appears to be.

But to know for certain you need to first diagnose whether the problem is the computer, or the monitor, or monitor cable.
Do you have another monitor and monitor cable available to use for a test?

If you have a VGA monitor, (Also known as CRT. Looks like a small TV), most likely the monitor cable does not disconnect.
For this test you would need another VGA monitor with cable.

If you have a flat screen LCD monitor, most of the time the monitor cable is changeable.
You can first use a Known to be good monitor cable, then if this doesn't work, use a Known to be good LCD monitor along with the good cable.

Still no progress?

Then the problem is the computer.
Bad Power Supply. Weak voltage power rail.
One of the leading causes of computer failure.

Also from the symptom stated it matches.

With a Power Supply that has a weak voltage power rail, (Or more than one), you will have enough power to light LED lights, and perhaps spin fans, but Not enough power to turn the Processor on.

1) ALL of the LED lights on at once use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts of power.

3) A typical Processor can use from 51 to 125 Watts of power.
Depends on what Processor it is.

This is why the computer may appear to be working fine, but in reality isn't.

Power Supply with a weak voltage power rail will run the Processor for a very short time, then not have the power to keep the Processor on.

How?
Power Supply's used in todays desktop computers are SMPS.
Switched-Mode Power Supply.

There are Electrolytic Capacitors used as Filters in the Power Supply.
They filter the incoming AC electricity, and the outgoing DC electricity to the computer components.

[ Electrolytic Capacitors are in the Input Stage, and Output Stage of a typical SMPS.

1) http://en.wikipedia.org/wiki/Switched-mode_power_supply

2) http://en.wikipedia.org/wiki/File:ATX_power_supply_interior-1000px_transparent.png

You can click on the photo to enlarge.
B shows Electrolytic Capacitors in the Input Stage of this typical SMPS. { Blue and 2 of them}
E shows more Electrolytic Capacitors used in the Output Stage ]

Electrolytic Capacitors can break down. They can operate in a weak stage as they are breaking down, for a small time period. Eventually they break down all the way, and fail.

This is how a Power Supply can work sometimes, then eventually one day it does not.

To explain Electrolytic capacitor break down, and failure:

Typical construction of an Electrolytic Capacitor;

Basic,
Three strips are rolled up tightly together, and inserted into a small aluminum 'can' case.
There is a rubber seal on the bottom of the case, and a seal on top of the case that can break open in the middle.

The three strips are;
1) A Conducting Strip
Thin metal foil usually made of aluminum. This is the Positive strip.

2) A Non-Conducting strip also made of thin metal foil, but has a non-conducting medium applied to it.

3) A paper-like strip that is soaked with Electrolytic Paste.

The Electrolytic paste soaked strip is put in the middle the Conducting strip, and the Non-Conducting strip, and all three strips are rolled up tightly.

At the bottom of the aluminum 'can' case is a synthetic rubber, flat disk shaped seal.
This is called the Bung.

There is a lead, ('Wire') going through the Bung to the Conducting strip. This is the Positive lead.
There is one more lead going through the Bing to the Non-Conducting strip. This is the Negative lead.

At the top of the 'can' case is a flat disk shaped, aluminum metal seal. This seal has an X, or Y shape etched part way into it.

As an Electrolytic Capacitor fails the Electrolytic Paste develops a gas.
Hydrogen gas.
The gas expands inside the aluminum 'can' case, and with enough pressure developed, the seal on top, and/or bottom are compromised.

The X or K shape that is etched partway into the metal disk on top, breaks open, and/or the synthetic rubber disk shape on bottom has one edge pushed out of the 'can' case.

This allows the gas to push Electrolytic Paste out of the 'can' case.
So much paste loss, and the capacitor operates in a weakened state.
Too much paste loss, and the capacitor fails.

Apologizes for the 'Windy' dissertation, but I thought it would be better to know what is going on, than receive a "Replace the Power Supply"

With No processor operating you essentially have No computer.
No computer operating = No Signal to the monitor.
(No video signal)


Need guidance in replacing the Power Supply, or suggestions for a Power Supply so you can compare, post in a Comment. (Believe upper right of your page)

Regards,
joecoolvette

Dec 01, 2010 | Computers & Internet

1 Answer

My 50 inch sony bravia screen cracked. how much is it to get repaired?


It can cost anywhere between £50 and $200 ($100 and £300) to get a 50 inch LCD TV fixed, if you have a Plasma TV, it'll be a bit more than that.

Oct 10, 2008 | Computers & Internet

1 Answer

Hi. i have an LG 42inch plasma, approx 18 months old. about 2 months ago, a green stripe developed down the right hand side of the screen, approx 1.5 inches wide. last week a 2nd stripe the same width...


Sadly, the plasma screen is failing. The green strip is no longer functioning properly and the failures will continue to progress.

If still under warranty, get it exchanged.

Jun 12, 2008 | Computers & Internet

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