Question about Zenith L13V36 13" Flat Panel LCD Monitor

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L13V36 Dark Screen, picture can be seen in bright light.

I just purchased a used L13V36 monitor TV. Sometimes when I turn it on the picture is bright and normal for just a second or two. The sound works but the picture is really dark 99.9% of the time. I can see it (barely) in bright floresent light. I tried the menus setting and turned the contrast and brightness up and down. Can this be repaired or should I just chuck it out? I'm guessing it's the back light. Thanks for any response. Jake

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Re: L13V36 Dark Screen, picture can be seen in bright...

Welcome to fixya

it sounds like the back light on both monitors are going bad
it might be better to call a repair man and get him to look at it see if it is going to be worth fixing i think it might be better then buying a new one at the prices now days

i hope this helps out have a nice day:)

Posted on Jul 16, 2008

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IH252 inc monitor bottom half darker than top.

Thin screen LCD monitor brightness controls operate several fluorescent lamps called "backlights" that are positioned behind the LCD display. Typically, they're located around the edges of the screen - sometimes just at the top and bottom, and other times at the left and right edges and others still at all 4 edges.

Fluorescent "backlight" lamp, inverter & connection wiring.

The lamps are miniature versions of those sold in stores. They require a support circuitry called an inverter that convert & boosts the level of DC to AC voltage performing the functions of a ballast in a traditional fluorescent fixture.

The reason a part of your screen remains dark is because one or more of the components in the picture above has failed and will not allow the lamp to shine. Replacement lamps and inverters aren't expensive - but requires patience and the ability to disassemble / assemble the monitor (which is usually harder to do than it appears) and solder. They are available various lengths and color temperatures (you must get a lamp that is identical or it will be noticed). If this is a new monitor - you ought to return it for replacement. If used, consider the cost of purchasing a replacement (new or used) vs. repair.

I hope this helps & good luck!

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My HP flat screen (crt) screen is getting dark

If the brightness control is set to maximum and the picture is still too dark, two things might be happening. The CRT picture tube may have deteriorated over time, and/or the high voltage circuitry inside the monitor is failing to deliver enough HV to the tube.
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Screen comes on then goes out in 5 seconds. The backlight goes dark but the seen is working, just can't see it. The backlight is out...

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That sounds like a bad power adapter, a bad inverter , or a bad controller board.

When TV does not start, and sometimes you hear a clicking noise, that means that the TV is on protect mode.

Try first leaving the TV power cord unplugged for some times, let say one hour or so.

Also ensure that the fault is not coming from a faulty receiver box sending bad signal, check if you get same problem with no receiver box or dvd connected.

If that does not work, and you keep having a flashing led on front of the TV, and tv turning off by itself after a while, that indicates a fault condition.

The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible reasons.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , startingthe flashing light.

If you are in situation one, then theTV will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

Common faults that can occur are a blown capacitor on power board, a convergence IC has blown, or a fault on Digital board.

Check also the video cable or any external connection cable, if the cable is shorting, or the connector is bad, you can get same flashing state because of the video cable.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

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If the backlight lights up for a second it's probably fine - It lay odds on the display inverter in the screen. Actually finding parts for anything made by gateway may be difficult, however. They do not sell spare parts. Considering the size of the LCD i bet it would almost exceed the replacement cost of the screen to repair it

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You probably have a problem with the back light inverters or the bulbs with this set. If you have no electronic background with working with TV sets, call in a pro to assist you in this repair. Good Luck

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