Question about Toshiba Satellite M105 Notebook

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BROKEN LCD... BURNED TRANSISTOR

I have a satellite M105-S3074 and had an accident where the lcd got broken, 
i tried to connect it without the lcd but didn't turn on only beeps but nothing 
on an external monitor,after inspecting the motherboard I found that the Q35 
transistor is completly burned and can't read the reference.
Could anyone tell me where I can find the servicemanual for this model or the reference af the transistor?
Thanks a lot

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Better bring it to the toshiba service center

Posted on Apr 10, 2008

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1 Answer

Are the display bands compatible?


1) Toshiba Satellite P300-13j LCD screen example,

http://www.screentekinc.com/Toshiba_Satellite_P300D-13J--17-inch--1440x900-wxgaplus-laptop-lcd-screen.shtml

Thin Film Transistor (TFT) Active Matrix LCD screen, that is WXGA, and uses one CCFL for a Backlight.

2) http://www.lcds4less.com/ToshibaLaptop__Toshiba_Satellite_P300D-12L__laptop-screens.html

Thin Film Transistor (TFT) Active Matrix LCD screen, that is WXGA, and has 1 CCFL for a Backlight.

There is a pretty good chance. The screen Inverter and LCD screen are a matched unit. I would remove the screen Inverter from the P300-12L, and use it also.

Looks like this,

http://www.lcd-inverter-shop.com/Toshiba/Toshiba-Satellite-P300D.html

If I may ask;
1) Is there obvious damage to the LCD screen?

2) If there is not obvious damage to the LCD screen, have you used an external VGA monitor with the laptop?

To see if the problem is the graphics chipset, or the video cable, or inside the Display Assembly.

A) http://www.irisvista.com/tech/laptops/Toshiba-Satellite-P305/take-apart-notebook-1.htm

B) http://www.irisvista.com/tech/laptops/Toshiba-Satellite-P105-P100/remove-lcd-screen-inverter-1.htm


Post back in a Comment.
Regards,
joecoolvette

[Primer:
An LCD screen cannot produce light by itself,
(Click on the monitor icon,

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

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.

LED stands for Light Emitting Diode

CCFL stands for 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/

Observe the last 8 photos especially. This article shows you that the LCD screen is an assembly. It is composed of layers. Just like the 3M company's tutorial. Also shows general instructions for replacing a Backlight.

A screen Inverter is used to convert the power from the laptop, for the LCD screen, and Backlight.
It is a small circuit board, and is usually mounted towards the bottom of the LCD screen, and behind the Display Bezel.

A CCFL, (Or two of them), uses a screen Inverter.
LED backlighting however, may or may not use a screen Inverter.

Using LED's for backlighting is relatively new, when discussing backlighting technology.
Some of the first designs of LED backlighting does use a screen Inverter.
Newer designs do not seem to.

90 PERCENT OF THE TIME the problem can be attributed to a bad screen Inverter.

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1 Answer

The LCD screen on my Toshiba L505D-S5965 is broken.


Here is a guide

http://www.irisvista.com/tech/laptops/Toshiba-Satellite-L500-L505/remove-lcd-screen-inverter-1.htm

Jul 08, 2010 | Toshiba Satellite L505-S5966 Notebook

1 Answer

Dead pixel


Dead pixels cannot be fixed, each pixel is controlled by a transistor that is part of the LCD screen. If it is bad, the only option is to replace the LCD screen.

Mar 30, 2009 | Toshiba Satellite A100-S8111TD Notebook

1 Answer

Lcd has broken


It is definately no repairable. The price vary from one service centre to other. You can call up your local toshiba helpline to inquire on price.

Feb 28, 2009 | Sony VAIO V505BXP Notebook

1 Answer

My toshiba cannot power up. i think a transistor


From what you're saying it sounds like a bad motherboard but your description is very brief. Please elaborate.

Feb 19, 2009 | Toshiba Satellite M105 Notebook

1 Answer

Broken Lcd newb questions.


It comes as all one unit...it is just a matter of getting the case apart, unplugging the LCD, plug in the new one...reassemble

Jan 27, 2009 | Toshiba Satellite A100-S8111TD Notebook

1 Answer

Flickering and Shaky Screen


The LCD backlight is burning out or the LCD inverter board that controls it is going bad. Backlights are cheap. Must take apart LCD screen assembly. Inverter is a bit more expensive. Definitely fixable.

Aug 24, 2008 | Toshiba Satellite A25-S207 Notebook

1 Answer

Satellite A35-S159 LCD Problem


Hi,

I don't think the LCD inverter is the problem. This part only powers the light of your LCD. I think the electronics on the back of the LCD is bad. You have to replace your LCD to fix this problem. Take a look on eBay for a affordable replacement.

Smile.

Feb 19, 2008 | Toshiba Satellite A35-S159 Notebook

1 Answer

Screen problems


Your LCD backlight has burned out, It needs replaced.

Jan 06, 2008 | Toshiba Satellite A45-S150 Notebook

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