Question about Toshiba Satellite A105 Notebook

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Toshiba laptop a105 dead screen

Phil H,
I have a Toshiba A105 laptop with a totally black screen. The machine works fine to an external monitor. I checked the hibernate switch and it appears to be OK. I replaced the inverter for the backlight today with no change. I disassembled the upper keyboard trim to enable a check of the screen cable to the system board and it appears OK. I did find a missing screw in the left hinge which also terminates a ground wire in the screen cable. I swapped the other screw in to tighten the ground with no apparent effect. Are there any suggestions out there?

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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.

Posted on Oct 04, 2008

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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

Toshiba A105-S4074 laptop's monitor has no backlight


Use the VGA port to connect an external monitor, this will get you up and running temporarily until you can fix the screen, it sounds like you have a faulty inverter.

Apr 06, 2010 | Toshiba Satellite A105-S4074 Notebook

1 Answer

Black Screen on Toshiba Satellite A105 S1014


Blown or damaged graphics chip on motherboard, would take to specialist repair shop

Feb 09, 2010 | PC Laptops

1 Answer

I have a Toshiba Satellite A505 S6930 and the screen went totally black and I can't do anything. I can log in with my password, but I can't see anything. Is there a screen lock or something? I've shut down...


Try Plugging an External Monitor to your SVGA Port on the system.
Then use your function button (Fn) and hit the external monitor button (Looks like a Monitor or TV screen) ...reason for this.
Is you might have your system set to external mode to use a monitor instead of being set to the main screen of your laptop.

Hope this helps.

Dec 06, 2009 | Toshiba Satellite A105 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

2 Answers

Toshiba Satellite A105 Display


If you've replaced the LCD Panel already, then chances are good, the failing part may be the FLR inverter. It's a thin little chip about 3 or 4 inches in length that bridges the connection between the LCD and the motherboard. It's location varies from computer to computer though, so you may have to check with manufacturer documentation. They're not too terribly expensive to replace though, much cheaper than the LCD panel, anyways.

May 09, 2009 | Toshiba Satellite A105-S4004 Notebook

1 Answer

Toshiba satellite a105-s1014


try the computer with an external monitor, if it works correctly then it's the monitor that has broke and you need it replaced.
otherwise, if it does the same things on the external monitor...
I would check in order:
1)RAM memory
2)Motherboard
if the problem is only after windows boot, try changing the video driver, the problem might be caused by overheating video Chip, but that should freeze the system too...try also to remove the dust from all the heatsinks with canned air...

Jan 18, 2009 | Toshiba Satellite A105 Notebook

1 Answer

Toshiba satellite a105 screen problem


You need a new lcd, The connectors are bad...

Dec 13, 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

1 Answer

Toshiba a105-s4054


Try pressing the following 2 keys simultaneously- Fn & F5. Do this only once. If this doesn't fix the problem, be sure to hit both of them simultaneously 1 more time to set the machine back in it's original state. What you are doing is switching between the internal monitor and an external monitor, should you ever have a reason to attach one.
R-

Nov 07, 2007 | Toshiba A105-S4054 Notebook

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