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Toshiba A105: Monitor goes black, will flicker when Fn F5 key pushed. How do I fix?

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Turn of the monitor and then unplug the power cord. Otherwise call toshiba and see if it is still under warranty

Posted on Aug 06, 2008

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How do i fix a split screen of my Toshiba c600d-t36b laptop


The quickest way to change the display output settings is to use the
display hot key (Fn + F5):
1 Press Fn and F5 simultaneously.
2 While holding down Fn, press F5 repeatedly until the setting
you want takes effect. Briefly pause each time you press the F5
key to allow time for the display to change.
This hot key cycles through the settings in the following order
(the last two options are available if an external monitor is
connected):
? Built-in display only
? Built-in display and external monitor (simultaneously)
? External monitor only
? Built-in display and TV (or other external video device)
? TV (or other external video device)
? External monitor and TV
? Built-in display and external monitor (extended mode)
? Built-in display and TV (extended mode)
? External monitor and TV (extended mode)
? Swap-Switch primary display between internal display
and external monitor when using extended desktop

Feb 12, 2015 | 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

Monitor boots up blank, I have to use an external monitor


Try to switch display output by pressing 'Fn' key with 'F4' or 'F5' key which has screen picture on it. Try it 2 or three times.
If it not works, then try it in windows, right click on desktop and in context menu see whether any display output option -> to monitor or to notebook. Click on to Notebook.
If still problem, you have to contact your vendor.

May 07, 2010 | Toshiba Satellite A105 Notebook

1 Answer

Toshiba A105 - S4334 laptop,imediately on startup the screen goes so dark I can't see anything but a shadow of the screen,if I clsoe lid and open again I can see the display but only for a few seconds.Is...


Hello wall flower hi, when you turn on the laptop, did you see the start up screen clearly? can you read words on the screen, and then it goes dark? If this is the case, check first the Fn key with the corresponding display for projector, (usually Fn+F5) this combination key is used to display the content of your computer to the LCD or Projector, IF not such a case, it may be problems with your laptop inverter board that powers the backlight. Check your bios settings also.

Feb 12, 2010 | Toshiba Satellite A105-S4334 Notebook

1 Answer

Screen not working


you could try the function key (FN) and one of the F keys. not sure, may be F5 or F8 to change the display to laptop screen and external monitor.

if this does not work you could have a broken LCD lamp.... Most likly the 1st solution

Aug 07, 2009 | Computers & Internet

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

I have a A105-S3021 laptop. The display is bad. I have been my home PC monitor to use my laptop until it is fixed. I unplugged my laptop today and now it will not allow me to use the outside monitor. It...


Mine did this the other day and fn + monitor mode style had been changed. its the key with the monitor icon on the key. i think f4 or f5 maybe.
try scrolling through those till you get something. worked for me.

Dec 16, 2008 | Toshiba Satellite A105 Notebook

2 Answers

Black Monitor


Try taking out your battery and leaving it out for 5 minutes.  During boot press F2 to access BIOS to check your default video out source is LCD.  Also try Fn+F5 to change the modes of video after you think windows is all the way booted up.  Does it POST?  When booting does the drives make noise then hear a beep.  If it beeps it passed Power On Self Test.
James Mac

Sep 09, 2008 | 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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