Question about Computers & Internet

1 Answer

LCDMonitors Manuals Dear Sirs I have a monitor that has a fault that the back light tube doe's not light When the screen is looked at with a torch light the information is there So do you know whare I can get a manual for this LCD monitor

Posted by on

  • gigawiz Feb 07, 2009

    Viewonic VG150m (white)

    I obtained this monitr through an old employer and he said the screen has stuff in the background, but the backlight doesnt turn on.

    I need some kind of manual for it or at least a website that will.

    Thanks in advance

×

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Contributor
  • 52 Answers

Att:Monit

Not too many manufacturers are providing schematic for their product. But you probably can try eservice.com if they have. you have to sign up to download. You did not mention the model of your manitor. However, if your monitor is old enough, it probably needs CCFL replacement. The ends of the tube usually get blacken when out just like the ordinary flourescent lamp. If still new, then it could be the CCFL driver (pwr supply).

Posted on Dec 28, 2007

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

How do I fix a flat screen tv that when turned on the screen is black with no picture?


place a turned on torch against the tv screen while tv on can you see a picture ? If yes then back light problem possibly inverter that powers the back light.
You tubesearch on tv faults for more insight on possible causes of black screen or no screen on Tv's

if no picture with torch then it might be main board .
Check you tube for ideas on possible causes.

Jan 27, 2017 | Televison & Video

1 Answer

Plays only background noise


If the screen is black - i.e. does not light up at all - then it is probably an inverter fault. Check this by shining a torch into the screen holding it very close, a faint image should bounce back at you. If that is the case, you need to open the back, find the part number for your inverter - usually a long panel down the left - and search for one on ebay or on a tv parts website.
If the screen lights up but you have no menu or picture then it is likely a T-con fault - this is a small board positioned in the middle of the TV usually near the top. Once again get the part number and find a replacement.
If the screen lights up and there is a menu but no picture then you're looking at a main AV board fault - that's the big one with the video inputs in. Replace this in the same way.

Jun 18, 2013 | Televison & Video

1 Answer

Samsung model 841 ax sound but no pix


If the screen is black - i.e. does not light up at all - then it is probably an inverter fault. Check this by shining a torch into the screen holding it very close, a faint image should bounce back at you. If that is the case, you need to open the back, find the part number for your inverter - usually a long panel down the left - and search for one on ebay or on a tv parts website.
If the screen lights up but you have no menu or picture then it is likely a T-con fault - this is a small board positioned in the middle of the TV usually near the top. Once again get the part number and find a replacement.
If the screen lights up and there is a menu but no picture then you're looking at a main AV board fault - that's the big one with the video inputs in. Replace this in the same way.

Jun 18, 2013 | Televison & Video

1 Answer

Tcl led tv


Looks as though the screen inverter has failed although hard to tell - am I right in saying the screen is not lighting up at all?
ONLY DO THIS IF YOUR TV IS OUT OF WARRANTY, otherwise call the seller or manufacturer and arrange a service.
If the screen is black - i.e. does not light up at all - then it is probably an inverter fault. Check this by shining a torch into the screen holding it very close, a faint image should bounce back at you. If that is the case, you need to open the back, find the part number for your inverter - usually a long panel down the left - and search for one on ebay or on a tv parts website.
If the screen lights up but you have no menu or picture then it is likely a T-con fault - this is a small board positioned in the middle of the TV usually near the top. Once again get the part number and find a replacement.
If the screen lights up and there is a menu but no picture then you're looking at a main AV board fault - that's the big one with the video inputs in. Replace this in the same way.

Jun 18, 2013 | Televison & Video

1 Answer

My screen goes blank when monitor is turned on.power light on monitor stays on. What is the problem?


If you look at the screen at a sharp angle and you see a faint Windows image then the problem is a back light fault. This fault can be caused by a faulty inverter board that supplies high voltage to the CCFL lamp OR the CCFL lamp is faulty. The CCFL lamp is a very small diameter fluro lamp/tube and just before they fail completely they product a pinkish light.
Replacement inverter and CCFL lamp are available from this WEB site.
www.lcdparts.net

Jul 03, 2011 | Samsung SyncMaster 205BW LCD Monitor

1 Answer

I have a Dell monitor model #1901FP when my computer comes on the monitor comes on as it should. After only a few seconds the monitor goes blank. You can turn the monitor off then back on the monitor...


The solution I am about to describe refers to a backlight problem, which is most common in Dell 15,17 & 19" monitors. The symptoms are as you describe:
  • You power on the monitor, the green on/off switch illuminates and the display works for approx 1-2 seconds and then goes blank.
  • The green on/off switch stays illuminated but the screen remains blank
  • If you shine a torch into the LCD matrix you can see the display being rendered faintly
  • Switching the monitor off and then on again illuminates the display again for 1-2 seconds before going blank again
This is a backlight fault and is most likely to be caused by the failure of two of the four driver transistors used to light the lighting tubes in the LCD Matrix. This fault is easy to repair if you (or a friend) have a soldering iron and a voltmeter.

Inside the monitor there is an inverter board that acts as a power supply for the monitor and the logic necessary to control the backlights (illumination and brightness control). There are four lighting tubes, which are controlled by two lighting circuits (two lighting tubes per circuit). At the heart of the inverter board is a chip that monitors feedback from the two lighting circuits and closes the back-light circuit down if either of the lighting circuits fail, thus any component failure will exhibit the same symptoms.

The transistors which fail most often cost pence to replace (types C5706 or C5707). However, their failure in unlikely to be the cause of the problem. My first crack at fixing this fault, by replacing the transistors, resulted in them failing again within 24/48Hrs. The cause of the problem will be dry solder joints or loose connections on the high-voltage side of the circuit, usually on the backlight transformer in the effected circuit. If you re solder each of the connectors on the transformer you will save the transistors from blowing again - the transformer generates 1,400Volts for the lighting tubes and at this voltage, arcing across the a dry solder joint, will quickly destroy the transistors again.

No soldering iron? - A complete inverter board replacement is also reasonably cheap and easy repair. These are widely available.

Sorry of this is more detail than you expected but it may help others reading this article.

Oct 12, 2010 | Dell UltraSharp 1901FP 19" Flat Panel LCD...

1 Answer

Screen is black


The problem is a back-lighting fault. This fault can be a faulty inverter board os a faulty CCFL lamp.
For service, parts and DIY info check out LCD Parts WEB site - click on this link to their WEB site :-
www.lcdparts.net

Jan 04, 2010 | HP vs15 15"LCD Flat Panel Monitor

1 Answer

Blank screen


Try plugging the laptop into an external monitor to make sure the laptop is booting up properly. If it is unplug the monitor from the laptop; or if you know the laptop boots up fine and you get the windows audio when it boots and the initial starting beeps then forget the monitor. Shine a torch or light source on the screen and if you see a faint picture then the inverter on the screen has developed a fault.
jon

Nov 04, 2009 | Gateway ONE GZ7108 All-in-One Desktop PC

1 Answer

After 5 minutes monitor screen dims--can faintly see the windows screen and then it flickers out and there is nothing. Any ideas?


the monitor may be going into power save mode which it should come out of when you press a key or move the mouse but it sounds like you have tube inverter issues. Your screen has light tubes behind it to illuminate the screen, if the tubes or the inverter develop a fault, then a very dark screen can result as the tubes are turned off. There may also be an ambient light sensor which will darken the screen in low ambient light. If the sensor is faulty, darkened screens will result. If the inverter is failing, you may be able to replace it, contact viewsonic. if the tubes are failing, replace the panel or the entire monitor. If the ambient light sensor is faulty, replace the panel or entire monitor as the sensor is part of the display panel.

Nov 02, 2009 | ViewSonic VG900b 19" LCD Monitor

1 Answer

My notebook works but the screen doesnt come on


Try attaching the laptop to see if it works on an external monitor.
if it doesn't its the graphic chip on the motherboard.(make sure you dont have to press F# to switch to monitor)
if it does look at the following
if it works then shine a torch or bright light into the screen Can you see anything? If you can its probably either the back light or inverter that's gone.
Still nothing try looking at the cables between the screen and the base. Are they worn?
These steps will generally confirm the error.

Feb 21, 2009 | HP 2133 Notebook PC

Not finding what you are looking for?
Computers & Internet Logo

Related Topics:

785 people viewed this question

Ask a Question

Usually answered in minutes!

Top Computers & Internet Experts

Les Dickinson
Les Dickinson

Level 3 Expert

18429 Answers

Alun Cox

Level 3 Expert

2678 Answers

David Payne
David Payne

Level 3 Expert

14162 Answers

Are you a Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...