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Demtec tv tft lcd realy dark picture - Televison & Video

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Hi,

Interpreting your description could mean that everything works except that it is dark. This being the case, then it could be indicative of defective:

  • CCF lamp(s) (cold cathode florescent); and or
  • inverter.
Depending on the size, there could be two or more lamps. The lamps provide the backlight similar to the LCD panel display of a cellphone. These lamps are powered by a high voltage/high frequency board called the inverter.

This of course would require a fair familiarity of electronic components/circuitry and safety procedures, use of a DVM and a soldering iron. It would be to your added advantage access to a service manual or at the very least a schematic diagram with voltage readings. Should you be uncomfortable performing a DIY (do-it-yourself), perhaps your best bet would then be to seek the services of a qualified professional.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Posted on Oct 01, 2008

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Coloured linens down the screen

Posted on Dec 30, 2008

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Posted on Jan 02, 2017

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I have model LCM-19v1 SL monitor and I need to know what type of power cord I need for it. and possible a picture


hi,

these are the specs for you monitor

Upgrade your desktop display in size and style with this Westinghouse LCM-19v1 19-inch LCD monitor! Its advanced HD-Grade flat panel technology lets you enjoy crisp, vibrant images while working on spreadsheets, writing email, watching movies, playing games and surfing the web.

Some key features include 1280 x 1024 native resolution, 600:1 contrast ratio, and a fast 21 ms response time. Its thin, sleek and sophisticated design will complement any office. Get yours today!
By law, California shipments of this product are subject to an $8.00
Electronic Waste Recycling Fee
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Features/Specifications:
  • Westinghouse LCM-19v1 19-Inch TFT LCD Flat Panel Monitor

  • General Features:
  • Silver Cabinet color
  • 19" diagonal screen size
  • Native/Optimum Resolution: 1280 x 1024 16.7 million colors
  • Compatible Modes: VGA, SVGA, XGA, SXGA
  • Contrast Ratio: 600:1
  • Brightness (Nits): 300 cd/m2
  • Response Time: 21 ms
  • Viewing Angle: 170 degree Horizontal, 170 degree Vertical
  • Built-in stereo speakers
  • Connectors: 3.5 mm stereo mini-jack. VGA-in, DC-in
  • DC Input: 19V - 3.1A
  • EnergyStar compliant

  • Regulatory Approvals:
  • FCC
  • UL
Package Includes:
  • Westinghouse LCM-19v1 19-inch TFT LCD Flat Panel Monitor
  • Power Supply (100-24V 50~60Hz)
  • Power Cord
  • Stand
  • VGA cable
  • Audio cable
  • User's Manual
Additional Information:
  • Requirements:
  • Available power outlet
  • VGA adapter

  • Notes:
  • LCD displays may have cosmetic imperfections that appear as small bright or dark spots. This is common to all LCD displays used in products by all vendor and is not specific to any vendor or brand. Below are the acceptable amounts of "dot defects" for LCD displays that we sell:
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  • Total Defects: 8
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  • Bright or Dark Dots (3 adjacent): 0
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for the adapter, already inserted the picture of it


matrix12.jpg matrix12_0.jpg

Hope this will help... Your response is very much appreciated....

Jan 20, 2011 | Computers & Internet

1 Answer

I have vertical bars on screen


Hello,

The T CON board of the television is bad, you need to replace this
The T-CON (Timing Control or LCD controller) board (on the LCD panel assembly). It transfer the universal image signal of TTL and LVDS signal to specific TFT (Thin Film Transistor) LCD.
This is the interface board that talks to the Logic board and the LCD panel to produce pictures on the screen. White/gray glowing screen when it fails or not getting the voltage from the logic board (the 5 or 12vdc is supplied by switched transistor on the logic board). Notes: T-CON board is mounted under the metal cover shield.
Common failures:
Scrambled pictures, Lines, multiple pictures, color smears/blotches, rolling pictures after warm up.
Blown surface mounted fuse.
No pictures, very dark screen almost like there is no backlights.

Hope this helps........

Jul 30, 2010 | Sony KDF-E55A20 55 in. LCD Television

1 Answer

We are having SAMSUNG LA37R81B tv at home its showin blurred picture we asked repair man he said we need the tcon board number so that we can buy we now need your help


Hello,
it possible that the problem is the the TCON board, you can try websites Shopjimmy.com,Ebay.com to buy a refurbish board for the replacement.

Also note that
The T-CON (Timing Control or LCD controller) board (on the LCD panel assembly). It transfer the universal image signal of TTL and LVDS signal to specific TFT (Thin Film Transistor) LCD.
This is the interface board that talks to the Logic board and the LCD panel to produce pictures on the screen. White/gray glowing screen when it fails or not getting the voltage from the logic board (the 5 or 12vdc is supplied by switched transistor on the logic board). Notes: T-CON board is mounted under the metal cover shield.
Common failures:
Scrambled pictures, Lines, multiple pictures, color smears/blotches, rolling pictures after warm up.
Blown surface mounted fuse.
No pictures, very dark screen almost like there is no backlights.
Hope this helpout..

Jul 30, 2010 | Samsung Televison & Video

1 Answer

Half of my lcd tv gets dark no picture


Find your warranty papers....may be a defective screen.

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1 Answer

Remote for TV doesn't light up


Tries better lighting,Glowing in the dark,figure it rare,hard to find.For the bigger keys tries buy a univeral remote,follow ur tv brand and inter the id codes than it operate then u done.

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1 Answer

Sony SDM-HS75 tft lcd monitor


Sounds like you need a new backlight. Check lcdparts.net

May 26, 2009 | Sony SDM-HS75 17" LCD Monitor

1 Answer

Dark screen on me laptop


the LCD backlight has failed, you will need to replace the LCD assy (about $200)

Jan 18, 2009 | Dell Inspiron 5150 Notebook

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