Question about Toshiba 55G310U LCD TV

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Screen is dim

Picture is on and working but there is no brightness. When I adjust backlight setting, nothing changes

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6ya6ya
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Posted on Jan 02, 2017

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budmrtn
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SOURCE: Toshiba 22LV505 TV-DVD:

Check the DC filter caps in the power supply first. Check the 24vdc (or 18vdc for this 22" model) to see if it goes away when the screen goes black.
There are main AC fuse, backlight inverter fuses, T-CON fuses.
If you are going to DIY and have proper tools and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

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http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com

Posted on Jul 08, 2010

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1 Answer

What is the OPC light?


OPC_ Optical Picture Control
Automatically adjust the brightness of the screen.
You can change the settings in the menu option.
It's in Menu, then picture, then OPC.

OFF- The brightness is fixed at the value set in "Backlight"

ON- Automatically adjusts

ON: DISPLAY- Displays the OPC effect on the screen while adjusting the brightness of the screen.

If you don't want the silly display from popping up all the time, go into to menu and change the setting to ON; instead of ON: DISPLAY

Feb 04, 2016 | Sharp Aquos Televison & Video

1 Answer

Sanyo dp26640 picture is dim


Try adjusting the Backlighting. With the new LCD/LED TV's the brightness control actually does very little to brighten the picture. If adjusting the BACKLIGHT setting doesn't improve it and it's out of warranty, then you're apt to discover that if it's even repairable that the cost of repair could easily exceed what you paid for it when it was new.

This is unfortunately one of the hard lessons associated with shopping for flat screen TVs. Regardless of what they cost when new, they all have one thing in common in that they can be very expensive to repair, often times resulting in the low cost/economy models being "throw-aways" when they develop problems. This makes the extended warranties sometimes worth the extra cost, as long as you realize thet the E/W has a maximum total claims pay-out equal to the amount you paid for the set when new. Example, if you buy a $300 TV and then get an ext'd warr. for it, then have a $200 repair claim, that leaves you with only $100 remaining coverage. That's how Ext'd warranties work.

Jan 26, 2014 | Sony Televison & Video

1 Answer

No picture


Sounds like you have a backlight problem. To verify this, turn on the set, dim the lights in the room, and shine a bright flashlight on the screen. If you see a faint picture you have a backlight fault. It could be as simple as a bad capacitor in the power supply, or a faulty inverter board, or in rare cases a bad backlamp.

May 04, 2013 | LG 32LD350 32 in. LCD TV

1 Answer

How do you turn on the Backlight on the screen?


If the screen backlight is not on, first try adjusting the brightness.
Press TV/AV button on remote to select TV mode. Press the MENU button on the remote. Using the arrow keys (navigation buttons), choose picture mode and adjust the brightness and contrast.
If your TV screen is still not lighting up in a dim room, then the backlight is broken.
You have 90 days labor and 1 year parts from date of purchase.

Oct 19, 2010 | Haier HLT71 7 in. Portable TV

1 Answer

Dark Screen even when i adjust the 'brightness' tab?


check the power settings on te unit, if it is set to default for the backlight, possible that your LCD's backlight is not powering up properly on the unit or LCD's backlight needs replacement.

Jun 03, 2010 | Apple iPod touch

1 Answer

My sony vaio vgn-n365e screen is Dim


The fault could be a faulty CCFL lamp or inverter.
To determine if you have a LCD screen, inverter or video card problem, read this and follow these instructions.
Defective CCFL backlight, it may have the following symptom: Screen flashs on red/pink and off. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickering on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp.
Connect an external monitor to your laptop and power the monitor up first then the laptop, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight. Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out
www.lcdparts.net
for parts, repair service and DIY info.

Jul 24, 2009 | Sony VAIO PCG-K23 Notebook

1 Answer

Adjusting screen brightness


If you hear the hard drive spinning and you think Windows is working but you can't see an image or a very dim image then :-
You could have a defective screen - a defective inverter or a CCFL lamp or simply the video cable needs reseating. After reseating the video cable and the problem is still there then :-
To determine if you have a LCD screen or video card problem, read this and follow the instructions.

Defective CCFL backlight, it may have the following symptom:

  • Screen flashs on red/pink and off.
  • Picture stays on in red and slowly be come normal.
  • Picture flickering with dim display or appear black.
  • Picture flickering on and off.
All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp

Connect an external monitor to your laptop and power it up, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight.

Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out www.lcdparts.net for parts, repair service and DIY info.

May 20, 2009 | Acer Aspire 5630 Notebook

1 Answer

Dark screen


if the picture is REALLY dark, like you can just barely see it in a lit room, then the backlight might not be lit. LCD TVshave backlight that shines through the LCD screen which allows you to see the picture.

If it's not the backlight then it would be the brightness/contrast settings that need to be adjusted. If the picture used to be normal and all of a sudden went dark, verify the backlight. Normally you can look through the slots on the top of the set and determine if the backlight is on. If you can see a bright light through any of the slots, the backlight is probably OK... go after the brightness/contrast settings.

Mar 25, 2008 | Vizio L37 Television

2 Answers

Dark scree


I too have the same problem with the same monitor.. tv looks great OSD looks great.. pc is dim.. This has nothing to do with the inverter board or the backlight.. I believe that there is an issue with the components that render the Computer video.

Jan 17, 2008 | Samsung SyncMaster 17" TFT LCD Monitor

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