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My video screen turns off after about an hour but sounds works fine.


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electro-medical.blogspot.com/

LCD TV Repair Tutorial Backlight Inverter Common Symptoms Solutions How to...

Nov 12, 2015 | Televison & Video

2 Answers

Xantrex power inverter 1750


The 14 AWG Positive wire should be connected to one side of a 30 A relay (typical fog lamp relay available at most automotive stores). The relay's other 30 A contact should be connected to the battery positive post via a 10 AWG (up to 6 ft/2 m)

Sep 07, 2008 | Xantrex Technology Xantrex Xpower 1750...

1 Answer

Laptop screen becomes black after 1 second


You have to diagnose the problem.......


Right off hand I would say the screen Inverter is bad, but this is just guessing......

Why?
Because your laptop may not use a screen Inverter.
It may use LED's as backlighting.


Or, it may have a pinched/damaged video cable.......


Primer:
An LCD screen cannot produce light. It needs an additional light source.
A Backlight is the additional light source.....


A Backlight can be a CCFL, (Or more than one), or a series of LED's.
(Light Emitting Diode)


A CCFL is a Cold Cathode Fluorescent Lamp. (Bulb)
Similar to Fluorescent lighting used in homes, and businesses; but on a MUCH smaller scale.


Average thickness is 2mm. That is a little larger than 1/16th of an Inch, or about the width of this capital letter -> O <-

Average length is almost as long, as the LCD screen is in height.


A screen Inverter is used to convert the power, (Electricity), of the laptop; for the LCD screen, and the Backlight.


A laptop that uses a CCFL, (Or more than one), uses a screen Inverter.
A laptop that uses LED backlighting, May or May Not use a screen Inverter.


Seems when the LED backlighting technology first came out, a few laptop models Did use a screen Inverter.
As the LED backlighting technology evolved, a screen Inverter was no longer used.

Average example of a screen Inverter,

http://www.amazon.com/Screen-Inverter-HP-Pavilion-DV6000/dp/B0058TMLLY

The LCD screen is in the Display Assembly.
The plastic frame in front of the LCD screen, is the Display Bezel.
(Different manufacturers use different terms. The above is for HP, and Compaq laptops)

Display Bezel removed, the screen Inverter is located at the bottom of the LCD screen.
That is IF, the laptop uses a screen Inverter.
If the Backlight is bad on a laptop that uses LED backlighting, the LCD screen itself is replaced.
The LED backlighting is built-in.

The Video Cable, (Display Cable, etc), connects to the motherboard, usually under an area under the Keyboard, or just above it. Some models have the Video Cable connecting to the Bottom of the motherboard, and at the back.

Average example of a Video Cable,

http://www.amazon.com/Video-HP-Pavilion-DV6000-FOXDDAT8ALC0041A/dp/B003YDLDBK

The Video Cable then routes through Channels, and Latches; and comes up around the left Hinge.
It then goes on to up into the Display Assembly.

Depending on the technology used, (screen Inverter, or no), the Video Cable splits off, and connects to the screen Inverter.
The rest of the Video Cable then connects to the back, of the LCD screen.

Due to just normal opening, and closing of the laptop; the Video Cable may become pinched, and/or pulled on.

This can cause the connection at the motherboard to become loose, and/or at the screen Inverter, (IF used), and/or at the back of the LCD screen.

It may also cause damage to the Video Cable. (Stretched/Broken)

Point?

1) May be just a loose connection/s of the Video Cable
2) May be a damaged Video Cable
3) May be a bad screen Inverter
4) May be a bad LCD screen.

Post in a Comment, as to the laptop manufacturer name, and model number.

This way I can step by step you through diagnosing the problem, for YOUR laptop; and not post a bunch of generic information.

HOWEVER, it does depend on if the information is available on the internet. Such as a free Service Manual, and/or pictorial guides.

I CAN guide you even if there is not, but if there is; it just makes it simpler for you.

I can tell you it is easy. Once you have performed this procedure, you may want to do it for a friend, or relative; if the situation arises.

Regards,
joecoolvette

http://www.insidemylaptop.com/

Jul 09, 2013 | Computers & Internet

1 Answer

Pink screen


Problem can be;

1) Graphics chipset
2) Video Cable
3) screen Inverter (IF Used)
4) LCD screen

Diagnose to find out.
I need the laptop manufacturer name, and model number.
Model number can be found on the Bottom of the laptop.

Post back in a Comment.

A) Graphics chipset:

An external monitor is used to check, and see if the display is also pinkish on it; or it is OK. Info posted I need, I will detail this procedure out step by step.

Display good on external monitor means graphics chipset is OK.
(Mounting is usually the problem)
Means problem is screen Inverter (IF used), or Video Cable, or LCD screen.

B) Video Cable:

The Video Cable connects to the motherboard, in an area under the Keyboard, or under the Switch Cover.
(Depending on laptop design, Switch Cover may be an integral part of Palm Rest Cover)

From there it leads under, or close by the left Hinge; and then goes up into the Display Assembly.

IF, a screen Inverter is used, the Video Cable has a separate small cable that branches off; and connects to one side of the screen Inverter.
The main part of the Video Cable connects to the back of the LCD screen.

Just due to normal repeated opening, and closing of the laptop; the Video Cable may become pulled on, and/or pinched.
This can lead to a loose connection at the motherboard side, or LCD screen side. (and/or screen Inverter, IF screen Inverter is used)

Can also lead to a damaged Video Cable. (Stretched/Broken wires inside it)
This can cause a pinkish screen.

C) screen Inverter:

With Backlighting that uses CCFL/s for a Backlight, a screen Inverter is used.
(Cold Cathode Fluorescent Lamp)

For Backlighting that is LED, a screen Inverter MAY, or MAY NOT be used.
(First design LED backlighting seemed to. Later design LED backlighting, does not. Light Emitting Diode)

A screen Inverter is used to convert the power (Electricity), from the laptop; for the LCD screen and Backlight.
Screen Inverter going out, can cause a pinkish screen.

D) LCD screen:
Graphics chipset is good, Video Cable connections are good; no damaged Video Cable, screen Inverter is good (IF used); problem is LCD screen.

Awaiting manufacturer name, and model number.

Regards,
joecoolvette

Apr 30, 2013 | Computers & Internet

1 Answer

White screen acer


White screen when you start the laptop, and then when you connect an external VGA monitor, you can only operate in Safe Mode?

Or white screen except when you are Safe Mode?

Doesn't matter anyway, just wanted to see what you are stating.

1) Have you connected an external VGA monitor to the laptop, and seen if you get a good display on the external VGA monitor?

No display on external monitor?
You have at least 3 display options available;
A) Internal monitor of laptop ONLY
B) Internal monitor of laptop AND external VGA monitor.
C) External VGA monitor ONLY

Hold the Fn key down, and tap once on the F5 key.
(The F5 key is the Display Toggle-Over key)
Still no?
Hold the Fn key down again, and tap once more on the F5 key.

Good display on external VGA monitor?
Problem is the Video Cable, or inside the Display Assembly.

White screen on external VGA monitor also?
Problem is the graphics chipset.

[Actually it is probably inadequate cooling for the graphics chipset, and this makes a bad contact of graphics chipset TO motherboard. If this is found to be the problem I can explain further, and in much more detail ]

Inside the Display Assembly:

A) Screen Inverter if it is CCFL backlighting.
May or may NOT be a screen Inverter if it uses LED backlighting.

[ CCFL - Cold Cathode Fluorescent Lamp
LED - Light Emitting Diode ]

B) LCD screen.

Video Cable:
The Video Cable connects to the motherboard, in an area either under the Keyboard, or under the Switch Cover, or bottom of the laptop.

[Switch Cover,
Goes by many names. It is the strip of plastic above the Keyboard, and below the LCD screen. Usually has the Power On button, and LED indicator lights; plus speakers, sometimes ]

From there the Video Cable goes under the left Hinge, and up into the Display Assembly.
If a screen Inverter is used, a small cable comes from the main cable, and plugs into the screen Inverter.
The main cable connects to the back of the LCD screen.

Due to normal repeated opening, and closing of the laptop; the Video Cable may be pulled on.
This can create a bad connection on motherboard side, and/or screen Inverter cable connection, (IF used), or to the back of the LCD screen.

It can also cause damage to the Video Cable.
(Stretched/Broken wires)

Once you post the product number I can guide you step by step, show you the components I'm talking about, and track down a Service Manual link, and possibly pictorial disassembly information.

The Video Cable connections are checked first.
A loose connection can cause what you are seeing.

The sheath of the Video Cable is also scrutinized for damage.
Obvious damage to the sheath, may mean damage to the tiny wires inside the Video Cable.

Another thing that can cause what you are seeing.

Video Cable connections prove not to be the problem, then the Video Cable is to be removed, and a continuity test performed on it.
Multimeter set to OHM's. (1K)

If a multimeter is not at your access, then suggest taking the Video Cable down to the nearest small computer shop, and have the resident tech check it for continuity. Should only be a couple of bucks.

YOU MUST rule out the Video Cable as the problem, before going on.

Video Cable checks out?
Then if a screen Inverter is used, this is the next component in the diagnostic flowchart.

Problem is this; it requires a sensitive multimeter to test a screen Inverter. Think fairly expensive,

http://www.fonerbooks.com/test.htm

The plastic frame in front of the LCD screen, is the Display Bezel.
The screen Inverter is located behind the Display Bezel, and mounted down towards the bottom of the LCD Screen Frame.

Due to the multimeter issue, the above noted ease of accessing to replace, and the usually low cost of the screen Inverter; most decide to just replace.

Screen Inverter replaced? Same problem?
The problem is the LCD screen.

No screen Inverter used? The problem is the LCD screen.

Video Cable; Usually around $9 to $20
Screen Inverter; Same.
LCD Screen; from $70 to $240. Just depends on what Lenovo laptop we're talking about here.

This is why you diagnose first.
Would be foolish to assume the problem is the LCD screen, and purchase one; when the problem may have just been a loose Video Cable connection, or one of the $9 to $20 components stated above.

Ready to diagnose?
Post the Product Number back in a Comment.

Regards,
joecoolvette

Jan 22, 2013 | Acer Computers & Internet

1 Answer

White screen but plugin monitor works. is it the screen?


http://support.acer.com/acerpanam/notebook/0000/Acer/Aspire5100/Aspire5100sp2.shtml

http://www.laptopscreen.com/English/model/Acer/ASPIRE~5100/

So you PHYSICALLY checked the connection of the Video Cable, TO the motherboard, TO the screen Inverter, and TO the back of the LCD screen?

Visual inspection will NOT do. If either motherboard connector, or LCD screen connector is loose, the width of this letter -> I < you won't see it, and it will affect the video signal.

The Video Cable connects to the motherboard under the Middle Cover, above the F4 and F5 key on the Keyboard. (Left edge of F4 key over to middle of F5 key)

[Middle Cover is Acer speak for Switch Cover. The cover strip above the Keyboard, and below the LCD screen ]

aspire-3100-5100-5600-lcd-cable-dc020007o00-.html
http://www.laptops-we-r.com/prestashop/aspire-5100-parts/109-acer-


Click on the view to enlarge. Top left side connects to the LCD screen. Rectangular Black connector with thick round cable, at the bottom, connects to the motherboard. Small cable coming off at the bottom, connects to the screen Inverter ]

From the motherboard connector the Video Cable routes up under the left Hinge, and into the Display Assembly. It then connects to the screen Inverter, and LCD screen.

From normal opening, and closing of the laptop, repeatedly, the Video Cable may become pinched.
This can lead to loose connections.

It can also lead to damage of the Video Cable.
If the sheath of the cable shows apparent signs of damage, the tiny wires inside may be damaged also.
Stretched/Broken

This means to ENSURE that the Video Cable is NOT the problem, a continuity test needs to be performed on all of the Video Cable's wires. (OHMS)
If an economical multimeter ($5 to $12) is not available, suggestion is to take it down to the nearest 'Mom and Pop' computer store, and have them check it. Labor charge should only be a few bucks.

Video Cable checks out it's on to the screen Inverter, for the diagnoses.

[NOTE*
This diagnoses is for an Acer Aspire 5100 Notebook PC. Uses a single (1) CCFL for a Backlight, and has a screen Inverter. Laptops that use LED's for a Backlight generally do not use a screen Inverter]

Did you test the screen Inverter, or replace it?

http://www.amazon.com/Acer-Aspire-5100-Inverter-PK070005U00/dp/B005F1N5O2

http://www.fonerbooks.com/test.htm

NOTE*
Takes a sensitive multimeter. Read fairly expensive.

Primer;

An LCD screen cannot produce light by itself,

http://solutions.3m.com/wps/portal/3M/en_US/NA_Optical/Systems/BehindTheScenes/Optics101/

Click on the monitor. Suggest start out with your audio turned down ]

It needs an additional light source.
A Backlight is the additional light source.

A Backlight can be a CCFL, (Or two of them), or a series of LED's.
(Light Emitting Diode)
The Acer Aspire 5100 Notebook PC uses a single (1) CCFL.

A CCFL is a Cold Cathode Fluorescent Lamp.
Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.

[Average thickness is 2mm. That is a little larger than 1/16th of an Inch.
Average length is almost as long, as the LCD screen is in height,

http://www.laptoprepair101.com/laptop/2007/12/09/replace-laptop-backlight-ccfl-lamp/ ]

A screen Inverter is used to convert the power (Electricity) from the laptop, for the LCD screen, and Backlight.

90 PERCENT OF THE TIME the fault is a bad screen Inverter.

Primer over.

If the screen Inverter is good, the LCD screen is bad.
Replace.

[The LCD screen, and the screen Inverter are a MATCHED unit.
When purchasing make sure you get the correct screen Inverter, or LCD screen ]

For additional questions please post in a Comment.

Regards,
joecoolvette

Sep 09, 2012 | Acer Aspire 5100 Notebook

1 Answer

Screen on laptop is distorted halfway


A) Video Cable connections are loose:
Connection at the motherboard, and the connection at the back of the LCD screen, in the Display Assembly.

Both need to be checked.

[For Toshiba the Video Cable is termed LVDS Cable.

Low-Voltage Differential Signaling Cable. I will just keep referring to it as the Video Cable ]

B) Video Cable is damaged:
Observe the sheath at the motherboard side of the Video Cable?
Is there obvious signs of damage to the sheath of the cable?

If so, there may also be damage to the tiny, thin wires inside the sheath, of the Video Cable.

Due to the routing of the Video Cable under the left Hinge, the Video Cable may be pulled on. This can create a bad connection.

Due to the above also, the Video Cable's sheath may be damaged, and the wires inside.

A view of the Video Cable by itself,

http://www.batterystyle.com/toshiba-satellite-a205-s5880-cable-p-484063.html

If the Video Cable checks out to be OK, the next item is the screen Inverter.
To test a screen Inverter you need a sensitive multimeter. This usually means expensive. { Or use a known to be good, compatible screen Inverter } Just thought I would state that. Don't want you to completely disassemble your laptop, just to fix a Video Cable, or screen Inverter. {Or LCD screen)

Most consumers decide to just replace the screen Inverter because;
1) If the problem isn't the screen Inverter, it is the LCD screen.
(A LOT of people buy an LCD screen, when all they really needed was a screen Inverter)

An EXPENSIVE part.
(LCD screen? $150 to $400 approximately. Screen Inverter? Usually around $22 to $48 )

2) The ease of access to replace.

As stated, if the problem isn't the screen Inverter, then it is the LCD screen.


1) With ALL power removed, AC adapter (Charger), and Battery, remove the Keyboard Bezel, and the Keyboard.

This is the motherboard connection side.

Display Assembly removed with Video Cable.
Now remove the Display Bezel, and LCD screen assembly, to access the Video Cable connection to the back of the LCD screen.


{NOTE*
The screen Inverter is mounted at the bottom of the LCD screen, and behind the Display Bezel }

This shows the Video Cable, and it's connection at the motherboard side,

http://www.irisvista.com/tech/laptops/toshiba-satellite-a205/laptop-disassembly-2.htm

Scroll down, click on the photo in Step 9.
The Video Cable is the cable to the upper Left side. Has one Red arrow pointing to the left.
The photo in Step 10 shows the Video Cable disconnected from the motherboard.

(This is Page 2 of a disassembly guide. Pages 1 through 4 are available above, and below. Page1::Page2::Page3::Page4::Find another model,
in white.
Just thought I would state that. Don't want you to completely disassemble your laptop, just to fix a Video Cable, or screen Inverter, or LCD screen) )

2) LCD screen side:

http://www.irisvista.com/tech/laptops/toshiba-satellite-a215/disassemble-display-panel-4.htm

http://www.insidemylaptop.com/remove-lcd-screen-from-toshiba-laptop/

All three links above will help you with checking the connections, or removing the cable to perform a continuity check. (Test)

Also with accessing the screen Inverter, and LCD screen.

For additional questions please post in a Comment.

Regards,
joecoolvette

Jan 25, 2012 | Toshiba Satellite A205-S5880 Notebook

1 Answer

Laptop comes up but screen remains black


If you have access to an external monitor, try connecting it to the laptop. If you have video, then press and hold the Fn key and tap the F7 key. This toggles the video from LCD only to external monitor only to both in three taps. If you still have no video on the LCD but you do on the monitor, shine a bright light on the LCD display. you may see the video displayed. If so, then you have either a bad back-light or a bad LCD inverter in the laptop display. I would suggest replacing both to be on the safe side. A bad LCD can damage the inverter and a bad inverter can damage the LCD.

Mar 30, 2011 | HP Compaq 6720s Notebook

1 Answer

Blank screen


If you have access to an external monitor, try connecting it to the laptop. If you have video, then press and hold the Fn key and tap the F7 key. This toggles the video from LCD only to external monitor only to both in three taps. If you still have no video on the LCD but you do on the monitor, shine a bright light on the LCD display. you may see the video displayed. If so, then you have either a bad back-light or a bad LCD inverter in the laptop display. I would suggest replacing both to be on the safe side. A bad LCD can damage the inverter and a bad inverter can damage the LCD.

Mar 30, 2011 | Toshiba Satellite A135-S2276 Notebook

1 Answer

If colors are inverted?can it b fixed


Yes,must replace the backlight video inverter board it dead,need a new board.If the LCD outer screen not damage buy people it self,but if it is than the LCD screen pannel is the prob.not the video backlight video inverter board.

Sep 26, 2009 | Dynex 32 in. LCD Flat-Panel HDTV

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