Question about Toshiba Satellite A105-S4004 Notebook

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Screen is dead on A105-S4104 laptop. External monitor works fine. How do I check to make sure that there is not just a loose cable?

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  • 32,281 Answers

This could be a faulty video cable or connector or CCFL lamp or inverter.
Try reseating the video cable/connector that connects to the motherboard first.
If this doesn't work then to determine if you have a LCD screen, inverter or video card problem, read this and follow these instructions.
Defective CCFL backlight, it may have the following symptom: Screen flashs on red/pink and off. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickering on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp.
Connect an external monitor to your laptop and power the monitor up first then the laptop, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight. Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out
www.lcdparts.net
for parts, repair service and DIY info.

Posted on Jul 16, 2009

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How do i repair toshiba satellite a105 ribbon cable repair


Have you tried hooking up an external monitor to it and seeing if it works? I would try that first to rule out a video card issue. If the external monitor works fine, here is a website with pictures on how to disassemble the laptop to replace the screen:
Toshiba Satellite A105 Laptop Disassembly Guide Cooling Fan Heatsink...

Jul 23, 2014 | Toshiba Computers & Internet

1 Answer

Display divided into 3 parts


LCD screen cracked, and Three even strips going across? Doubtful. Haven't seen it but I always have my mind open.

Three strips that are irregularly shaped? Look like glass that has cracked?
'Jagged edges'?

LCD screen is broken.

Three even strips indicates to me, that there may be a problem with the Video Cable. Then the screen Inverter is next in the diagnoses.
My money is on the Video Cable.

ALL power removed, Anti-Static Precautions FOLLOWED, I would check out the graphics chipset first.

1) Laptop OFF, monitor OFF, connect a VGA monitor to the VGA port on the laptop.
Left rear side. This is an example of a VGA Cable, and VGA connector. (VGA port on a laptop ),

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

(Color of connector does Not matter. It is generally Blue, though)

You can use a CRT type of monitor, (Looks like a small TV), or a flat LCD screen monitor if it has a VGA cable.

2) Turn the monitor on. If a CRT type allow it to warm up.
Turn the laptop on.

There are at least 3 display options available;
1) Laptop internal monitor ONLY
2) Laptop internal monitor AND external VGA monitor
3) External VGA monitor ONLY

Press, and hold down on the Fn key, and at the same time tap once on the F5 key. (The F5 key is the Display Toggle-Over key)

No display on external VGA monitor?
Hold the Fn key down again, and tap once more on the F5 key.

Is the display on the external VGA monitor, the same as the internal monitor of the laptop?

Problem is the graphics chipset.

Display is fine on the external VGA monitor?
Problem is the Video Cable, screen Inverter, or LCD screen.

Video Cable:

A) http://www.irisvista.com/tech/laptops/Toshiba-Satellite-A105/big/Toshiba-Satellite-A105-14.jpg

Switch Cover removed, Keyboard removed. Shows you where the Video Cable plugs into the motherboard.

B) http://www.irisvista.com/tech/laptops/Toshiba-Satellite-A105/big/Toshiba-Satellite-A105-21.jpg

Palm Rest Cover you can see the white rectangular connector, for the motherboard side of the Video Cable, at the top left.
It's above the black cable, and near the screw hole.

The Video Cable leads from the motherboard, up through the left Hinge, and into the Display Assembly.
From there it connects to the screen Inverter, and back of the LCD screen.

http://www.ebay.com/itm/Toshiba-Satellite-A105-6017B0050801-LCD-Video-Cable-Genuine-OEM-Laptop-TESTED-/290754851160?forcev4exp=true&forceRpt=true

In the photo, (You can hover your mouse cursor on it to enlarge), the right side connector plugs into the back of the LCD screen.

The black connector to the far left connects to the motherboard.
The small white connector at the top with the Red, Green, Black, etc wires, connects to the screen Inverter.

(The small Black cable, that comes out from the black motherboard connector, is a Ground wire )

Due to the close proximity of the Video Cable to the left Hinge, it can be pulled on from just normal opening, and closing of the laptop over time.

This means the Video Cable connection on the motherboard side could be loose, or the LCD screen side, or both.

The diagnoses is to PHYSICALLY check BOTH connections. A loose connection at the motherboard, or at the back of the LCD screen could be so small in distance, that you will not see it with the human eye.

Could also result in damage to the Video Cable.
View the Video Cable with the Switch Cover removed, and see if there are any obvious signs of damage to the sheath of the cable.

If there is there could be damage to the tiny wires inside the Video Cable. (Stretched/Broken)

Use a multimeter set to OHMs, to check all wires inside the Video Cable for continuity, or have a 'Mom and Pop' computer store check it for a few bucks, or replace the Video Cable.

Video cable connections are tight? Video cable continuity check checks out OK?
Screen Inverter.

The test for a screen Inverter is to use a sensitive multimeter.
Read fairly expensive.

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

Not having access to a sensitive multimeter that you can use, means just replacing the screen Inverter. Seems like 'part changing', and it is, but you have to work with what you've got.

http://www.sparepartswarehouse.com/Toshiba,Satellite,A105,Laptop,Inverters.aspx

Find THE model number for your laptop, and the correct screen Inverter. A screen Inverter, and an LCD screen are a MATCHED unit.

Screen Inverter is checked out to be OK, or replaced, and symptoms are still the same, the problem is the LCD screen.

Remember, the first part of the diagnoses was to see if the divided parts were EVEN going across, or jagged and irregularly shaped.

Jagged in shape, and not even strips going across, means cracks in the LCD screen.
Replace.

http://www.irisvista.com/tech/laptops/Toshiba-Satellite-A105/remove-replace-LCD-screen-1.htm

[ Main article for A and B links above;

http://www.irisvista.com/tech/laptops/Toshiba-Satellite-A105/remove-motherboard-1.htm ]

For additional questions please post in a Comment

Regards,
joecoolvette

Oct 22, 2012 | Toshiba Sattelite A105-S2051 Notebook

1 Answer

My screen has horizontal lines across half of the screen. I hooked up to a external monitor and it worked fine. What is the problem?


Hi,
It would physically be in the LCD screen of your computer. If the monitor is working fine therefore there is nothing wrong with the video processing output or the drivers in the operating system. It would be in internal crack on the LCD or a loose connection with the LCD screen and the motherboard.
Its best to have your laptop checked by a service technician and dont just disassemble it by yourself to prevent accidents. Worst case is that the LCD needs to be replaced if really found cracked/defective.
Hope this helps.

Jul 08, 2010 | Toshiba Satellite A105-S4004 Notebook

1 Answer

Toshiba Satellite 1405-S171 dead screen; external monitor works fine. How do I open case to check video cable connection?


Unless your screen's hinges (pivots) are busted, the video cable ain't gonna come loose on its own.

But if you have to check, it's underneath the keyboard. Remove the plastic strip above the KB, after that, it's three screws (L, middle, R), and you can lift up the keyboard. The video cable is the big bundle right behind the DVD drive.

Mar 12, 2010 | Toshiba Satellite 1405-S151 Notebook

1 Answer

My Toshiba Satellite A105 screen comes on for a little bit, flickers and then shuts off. However I can faintly see the screen, and the laptop works fine when hooked up to the external monitor. Wondering...


If you can still view screen if you view it in an angle or spot a flashlight on screen. Then, definitely it is a problem on backlighting, might be loose connection, inverter giving up or cfl giving up.

Hope this helps

Nov 06, 2009 | Toshiba Satellite A105 Notebook

1 Answer

Satellite A105 LCD does not work have to use with desktop monitor


You most likely have a defective screen - a defective inverter or a CCFL lamp or simply the video cable needs reseating. After reseating the video cable and the problem is still there then :-
To determine if you have a LCD screen or video card problem, read this and follow the instructions.

Defective CCFL backlight, it may have the following symptom:

  • Screen flashs on red/pink and off.
  • Picture stays on in red and slowly be come normal.
  • Picture flickering with dim display or appear black.
  • Picture flickering on and off.
All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp

Connect an external monitor to your laptop and power it up, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight.

Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out www.lcdparts.net for parts, repair service and DIY info.

May 29, 2009 | Toshiba Satellite A105-S4004 Notebook

1 Answer

Toshiba laptop a105 dead screen


it looks like the power supply for the light on the lcd screen os disconnected.If you can go deper to dissassemble the laptop you will find the connectors(like small plugs).check all the wires connecting to the screen.

Oct 04, 2008 | Toshiba Satellite A105 Notebook

1 Answer

Toshiba Satellite A105


Have you tried connecting to an external monitor? Try that. If the picture is perfect on the external monitor then the VGA port is OK but there is a problem with communications between the system board and the screen connector.

Hope this helps. Kindly leave a rating.

Thanks :)

Mar 05, 2008 | Toshiba Satellite A105-S4004 Notebook

3 Answers

Moniter problem


the LCD screen is damaged.

hope this helps

Jan 08, 2008 | Toshiba Satellite A105 Notebook

1 Answer

Toshiba Satellite A105 PC Notebook


When you turn it on, do you hear any activity? Motors start working, fan spinning, etc…? Try to connect an external monitor and start the laptop. Check if you can get any video on the external monitor. If the external monitor is dead too, try to remove the battery and start the laptop from the AC adapter. It also might be a bad memory module or a bad connection between the memory and the motherboard. Try to reseat the memory module, move it to the second slot. If you have two memory modules, try to remove them one by one and turn on the laptop. Also, try to remove the hard drive and see if you can boot it to Toshiba screen without the hard drive installed.


There is no special button to reseat the BIOS settings. To do it, you’ll have to access the BIOS using F2 button on the laptop start up, but as you have no video, you cannot access the BIOS and set it to defaults.
I

Dec 27, 2007 | Toshiba Satellite A105 Notebook

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