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How difficult is it to replace a laptop monitor?

I have a Toshibal Satellite laptop L35 with vertical lines running through the monitor. I have taken the monitor frame apart to see if I can replace the monitor myself, but I have some doubts I can do the job. Do you have any suggestions?

Joe

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Hi There Joe,

I'm a professional Laptop repair specialist. Before you go any farther, either using your own or one beloging to friend, connect your Toshiba to an external monitor and see whether the lines appear there also, or the screen displays properly. This will tell worlds about your problem.

1. If the lines appear on the external monitor as well, it means that your video card on the motherboard is about to fail and you would want to go to eBay and type into their search box "Motherboard Repair". There are good companies there which I have used and you can get the problem repaired for around $100.

2. If the lines do NOT appear on the external monitor you could have one of several problems.
a. loose lcd cable connection on the motherboard or behind the lcd
b. failing Screen Inverter just below the lcd behind the frame
c. the lcd itself

If you intend to try any sort of repair on a Toshiba yourself, make sure a tutorial is available for your model at this site before you begin:

http://www.irisvista.com/tech/

Toshiba Laptops are generally a higher degree of dificulty than many others. Losing one wrong screw can cause the laptop to refuse to boot after reassembly because Toshibas use some screws to double as electrical grounds.

You'll have to be the judge of what you feel comfortable with, but I feel I've covered almost all possibilities except a spill on your laptop that you might not have known about.

Regards,
TheSelkie

Posted on Jul 14, 2010

Testimonial: "Thank you very much, what a great response. No lines appear when I attach it to a desktop. Somewhere along the line I discovered that if I 'twist' the monitor just a bit, in other words put outward pressure on the bottom left of the monitor and pull inward a bit on the upper right hand corner, the lines will change until I release the pressure. Thanks again for your very detailed and informative response."

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My toshiba L35-S2161 the monitor only displays lines in colors, what to do to fix it


Since you diagnosed by using an external VGA monitor, you now know the fault lies in either the Video Cable, or the Display Assembly.

Your graphics chipset is good.
(Also known as GPU. Graphics Processing Unit )


A) Video Cable:
(Toshiba = LCD FL Cable )

See if the connections are good. Check the motherboard side connection of the Video Cable, AND the LCD screen side connection.

A loose connection can do this.

1) http://www.irisvista.com/tech/laptops/Toshiba-Satellite-L35/taking-apart-laptop-1.htm

2) http://www.irisvista.com/tech/laptops/Toshiba-Satellite-L35/remove-notebook-screen.htm

(On both links above you can click on the photos to enlarge )

Observe the sheath of the Video Cable for obvious signs of damage.
If the cable looks pinched, stretched, or torn, the tiny wires inside the cable may be damaged also.

Best method is to remove the Video Cable, and perform a continuity test of the wires inside the cable, with a multimeter.
(An economical unit can be purchased for around $8 to $12.
Analog or digital is fine )

B) Display Assembly:

Video Cable checks out OK;

1) Check the connections to the screen Inverter board.
Make sure they are tight. Make sure the Inverter board does not appear to be damaged.

2) Screen Inverter board:

Primer;
An LCD screen does not produce light. It needs an additional light source.

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

A Backlight is the additional light source.
A Backlight is usually a CCFL, or a series of LED lights.

The Toshiba Satellite L35-S2161 Notebook PC, uses a CCFL for a Backlight. (Uses 1 CCFL)

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

(Average size is 2mm Thick, and is close to the width of the LCD screen in question, Long )

A screen Inverter converts the power (Electricity) from the laptop, for the Backlight and LCD screen.

It is located behind the Display Mask, (Display Bezel), and mounted towards the bottom of the LCD screen.

http://www.zkarlo.com/selected-zkarlo-part/inverter-board-p2215.php

A bad screen Inverter usually causes a garbled display, or doesn't light the Backlight up.

To test a screen Inverter you need a sensitive multimeter, or use a spare Backlight bulb that is known to be good.

Bulb lights up the Inverter is good, the Backlight in the LCD screen assembly, is bad.

[ The LCD screen is composed of layers. These layers are held in place by a metal Screen Frame. {Resembles a picture frame }

The Screen Frame comes apart.

Screws are removed, and the Screen Frame comes apart in four pieces, (Four sides), or the Screen Frame comes apart in two pieces as an Upper half, and Lower half.

http://www.irisvista.com/tech/laptops/Toshiba-Satellite-L35/big/satellite-L35-screen-08.jpg

The Backlight bulb is taped to one side of the LCD screen layers, and is under that side of the Screen Frame.

The LCD screen layers MUST be kept aligned, as they were from the factory. For this reason alone, it is tedious for an experienced technician, and is usually not done at the consumer, or DIY level.

http://www.zkarlo.com/selected-zkarlo-part/lcd-cable-p2216.php

More in a Comment.

Regards,
joecoolvette

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http://www.irisvista.com/tech/laptops/Toshiba-Satellite-L35/taking-apart-laptop-1.htm

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