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Screen back lighting not coming on

Advent 7094 lap top with a 14.1" screen , all works ok except there is no backlighting on the screen, i can just make out whats on the screen if i tilt it and catch some sunlight, if i plug in an external monitor it is all ok, do you know if this is a common fault and is it poss to fix,
thanks bob

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  • 41 Answers

Yes it's common it is the backlight inverter which is defective. it's a relatively easy to replace part (just under the LCD panel) and it's not too expensive too. The problem is you should contact the manufacturer for the exact model (if you have warranty) or disassemble yourself (if you have the knowledge and you're out of warranty) and check the small PCB (printed circuit board) under the LCD pane,l it should have a sticker on it with the model number and search online for the same model.

Posted on May 26, 2010

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1 Answer

Advent 7111 narrow screen


If the display isn't going full screen, on that 15.4 inch TFT LCD screen, the problem is the screen Inverter, or LCD screen itself.

90 PERCENT OF THE TIME the fault is the screen Inverter.
It isn't a simple screen resolution setting that needs to be changed.

http://www.laptoppowerjacks.co.uk/advent-inverter/advent-7111-7107-8315-lcd-screen-inverter-as023217127-iv09140t-lf.html

Primer:

An LCD screen does not produce light by itself,

http://solutions.3m.com/wps/portal/3M/en_US/Vikuiti1/BrandProducts/secondary/optics101/

It needs an additional light source.
The additional light source is a Backlight.

A Backlight can be a CCFL, or a series of LED's.
The Advent 7111 Notebook PC uses One CCFL,

http://www.screencountry.com/index.php?section=products&model=7111&brand=Advent&size=

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

(Average size is 2mm Thick. Length is almost as long, as the LCD screen is in height. 2mm is close to 1/16th of an Inch )

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

Primer over.

I don't have access to a Service Manual, for the Advent 7111 Notebook PC. I haven't had one come to my shop for repair.

I DO have years of experience at repairing laptops, and I see the Advent 7111 is just a basic laptop, as I HAVE repaired over the years.

If you wish, I can guide you step by step, in replacing the screen Inverter.

(MANY people go out, and buy an LCD screen, when the problem is a much less expensive screen Inverter. Afterwards they buy the screen Inverter. Too bad they didn't come here first)

Post back in a Comment.

Regards,
joecoolvette

[ The Advent 7111 Notebook PC is just a re-badged Quanta TW3M.
According to the source, you should see TW3M on the bottom of the laptop.

http://www.uktsupport.co.uk/advent/laptop/7111.htm

May 20, 2012 | Advent Computers & Internet

1 Answer

My screen will not work on T3100


If your laptop appears to boot up and the hard disk LEDflashes, then the problem is probably a back light fault. This can be a faultyinverter or a faulty CCFL lamp. Please click on this link and follow myinstructions to identify the fault and possible fix :- http://www.fixya.com/support/r3598095-faulty_laptop_lcd_screen

Feb 12, 2012 | Advent Computers & Internet

2 Answers

Screen on laptop advent 7102 very dull can hard use it hardly any brightness


The LCD screen for the Advent 7102 does not produce light. It needs an additional light source.
A Backlight is the additional light source.

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

An Inverter (Screen Inverter) converts electricity from the laptop, for the LCD screen, and the Backlight.

90 PERCENT OF THE TIME the fault is the Inverter.


The Inverter is a small circuit board located behind the Display Bezel, and under the LCD screen.

[ The Display Bezel is the thin plastic frame in front of the LCD screen. Resembles a picture frame ]

Example of a screen Inverter for an Advent 7102 Netbook PC,

http://www.laptoppowerjacks.co.uk/category-27/Acer12.html


Regards,
joecoolvette

Oct 17, 2011 | Advent Netbook

2 Answers

Backlight not working on acer travelmate 5520 lap top lap top is working ok but screen is very dark


You can buy the parts to fix these on Ebay. There are two components. 1 is the light source itself. (Very fragile)
The other component is the the power inverter for the light. Both have a history of going bad. They have to be removed to be tested. Probably better to replace both as a set.

Apr 22, 2010 | Acer TravelMate 5520 Notebook

1 Answer

Screen savers


Go to Control Panel choose Display Properties go to Desktop tab there is a selection from Position: center, stretch, tile choose the stretch then apply and ok, your picture will displayed in full screen in your desktop

Nov 09, 2009 | Computers & Internet

1 Answer

Advent 7094swf turned off and never turn on again


i would say the hard drive needs replacing

Oct 15, 2009 | Advent Netbook

1 Answer

Advent 7098 faulty screen?


Angle the screen to the light. If you can see a faint screen image then it's probable that the backlight's inverter has either failed, it's cable has become damaged or the backlight has failed. Both of these can be tricky to replace unless you have the right tools, but can be done provided you can get a spare. Usually it's a tech job.

If the image is not there then it's either the screen itself, the graphics chip or, more likely, the ribbon cable that connects the screen to the motherboard.

You can rule out the graphics chip by plugging the laptop into a monitor.

Of course, the ultimate problem is that you've bought an Advent laptop! And most techs agree that Advent produce the worst laptops in the world. :(

Jun 07, 2009 | Computers & Internet

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