Question about Toshiba Satellite P105-S921 Notebook

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I have no Keyboad and Monitor response

I have a Toshiba P105 Laptop and when I turn it on there is no response on the keyboard or the monitor. There is power and the disc drive seems to work. I tried usng the recovery disc and still nothing. In addition, I connected the laptop to an external monitor and it appears to work.

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Toshiba Satellite P105-S9722 white screen on stat up


Don't assume. Diagnose.

Problem could be graphics chipset, Video Cable, screen Inverter, or LCD screen.

Graphics chipset:

1) Laptop OFF, monitor OFF, connect a VGA monitor to the VGA port, on the laptop.
(Back of laptop - Blue)

Example of a VGA Cable, and a VGA connector, (Port on laptop),

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

If you have a CRT type of monitor (Looks like a small TV), you can use it, or a flat LCD screen monitor with a VGA cable.

The Toshiba Satellite P105-S9722 Notebook PC, also has a DVI connector on the back of the laptop. (Next to the blue VGA port)
You can connect a flat LCD screen monitor with a DVI cable.

Example of a DVI Cable, and DVI connector,

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

2) Turn the monitor on. If a CRT type allow it to warm up.
Turn the laptop on.
By factory default the display should be on the external monitor.

If not;
Press, and hold down on the Fn key, (Bottom left), and tap once on the F5 key.
The F5 key is the Display Toggle-Over key.

You will see a list. It 'hot cycles' through the list, until you come to the external monitor device you are using.

http://shop.mcccomputers.com/network-modem-cards/6037-toshiba-satellite-p100-p105-p105-s6104-p105-s9722-video-board-256mb-ts15082.html

External monitor display shows no white screen?
Your graphics chipset is good.
Go on with the diagnoses.

Problem is with the Video Cable, or in the Display Assembly.
(Screen Inverter or LCD screen)

Video Cable:
The Video Cable attaches to the motherboard under the Switch Cover, and about at the F2 and F3 keys.
It then routes under the left Hinge, and up into the Display Assembly.

From there it connects to the screen Inverter, and back of LCD screen,

http://www.irisvista.com/tech/laptops/toshiba-satellite-p105/big/toshiba-satellite-p105-11.jpg


From;

http://www.irisvista.com/tech/laptops/toshiba-satellite-p105/take-apart-1.htm

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

Due to normal opening, and closing of the laptop, the Video Cable may become pinched, and pulled on.
This can lead to a simple loose connection of the Video Cable TO the motherboard, or TO the back of the LCD screen.

(The screen Inverter connection should also be checked)

Visual inspection will NOT do. You need to physically see if you can plug the motherboard connection, and LCD screen connection in.
It could be just loose enough you won't be able to see it, but will affect the display.

Sheath of Video Cable needs to be visually inspected for signs of damage. Signs of damage to the sheath, may also mean damage to the tiny wires inside the sheath of the Video Cable.
(Stretched/Broken)

Assurance that the Video Cable is not the problem, means checking out, or have checked out, with a multimeter set to OHM's, to run a continuity check of all the wires.
('Mom and Pop' computer store. See if they will check it)

Or simply replace the Video Cable. (After you fire up the laptop, and see if loose connections was, or was not the problem)

http://www.batterysupport.com/toshiba-satellite-p105-s9722-cable-p-377633.html


(Left side connects to LCD screen. Right/Top connector goes to motherboard. Right/Bottom connector goes to screen Inverter)

Video Cable checks out OK?
Go on to screen Inverter.

http://www.ebay.com/itm/TOSHIBA-Satellite-P105-S9722-laptop-lcd-Screen-Inverter-/250759700669


The plastic thin frame in front of the LCD screen, is the Display Bezel.
The screen Inverter is behind the Display Bezel, and mounted at a location towards the bottom of the LCD screen frame.

A screen Inverter is tested with a sensitive multimeter. Read fairly expensive,

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

It is for this reason that those who do not have access to a sensitive multimeter, usually just replace the screen Inverter.
(Also low cost, and ease of access to replace)

Screen Inverter checks out OK?
Problem is the LCD screen,

http://www.amazon.com/SATELLITE-P105-S6084-P105-S9722-P200-140-REPLACEMENT/dp/B007QEEYGE


For additional questions please post in a Comment.

Regards,
joecoolvette

[ Bet it's the video cable, or screen Inverter, that is the problem ]

[ Primer:
An LCD screen cannot produce light by itself. 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.
(Light Emitting Diode)

The Toshiba Satellite P105-S9722 Notebook PC, uses One CCFL for a Backlight.

A CCFL is a 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,

General example,

http://www.laptoprepair101.com/laptop/2007/12/09/replace-laptop-backlight-ccfl-lamp/

A CCFL contains -> Mercury, just like Fluorescent lighting used in homes, and businesses.

A screen Inverter is used to convert the power from the laptop, for the Backlight, and LCD screen.
90 Percent of the Time the fault is a bad screen Inverter.

Primer over.

Oct 16, 2012 | Toshiba Satellite P105-S9722 Notebook

1 Answer

I have Toshiba SATELLITE P105-S6197 Laptop and suddenly a horizontal while/grey lines appeared as a strip and after windows login it appears as a black strip at right side


Sounds like a bad screen. The easiest way to verify that would be to attach this to an external monitor (at work, a friend's ... if you ain't got one) - if the external monitor apprears good then you've pretty much iso'd the problem to your laptop's screen. This model uses a 17" widescreen. Best place to buy 'em would be on eBay, and they'll usually run around $90 to $100 if you need one right away - half that amount if you've got time and patience :-)

Sep 06, 2011 | Toshiba Satellite P105-S6197 Laptop...

1 Answer

Change monitor hooks


Requires the replacement of part of the screen cover. You can send me the unit for repair if you can't get it repaired locally.

Jan 05, 2010 | Toshiba Satellite P105-S6177 Notebook

2 Answers

Screen will not come on.


If the Toshiba appears to boot up but the screen is black then it could be a back-light problem. For instruction to determine the fault and fix please follow my instructions - click on this link :-
http://www.fixya.com/support/r3598095-faulty_laptop_lcd_screen

Dec 24, 2009 | Toshiba Satellite P105-S6104 Notebook

2 Answers

Toshiba P105, backlight dont turn on in my lap


If the LCD, inverter etc works in anothe laptop but not in the original laptop then it looks like a motherboard problem, possibly the power supply to the inverter.

Oct 11, 2009 | Toshiba Satellite P105-S921 Laptop PC...

1 Answer

Toshiba Satellite P105-S9722. monitor will not


Hi,
The problem is the inverter cable or the inverter itself.

If you have any warranty left on the laptop then i recommend you take advantage of that and send it in for repair, or you can deal with this 2 ways.
Fix the problem yourself.
Remove the screen bezel (plastic screen surround), this will reveal the whole screen. At the bottom of the screen you will see an elongated piece of circuit board with wires coming from either end covered by frosted plastic.
That is the inverter, check the connections on the inverter and power the laptop up to check the display, to remove it gently pull the plugs from each end and remove the screw from the middle and pull the board away.
Look at the inverter for a copper coil, if you re-solder the solder points around the coil you may find it works again as components that suffer from extreme heat the solder joints dry causing bad connections, re-floating the solder solves the problem in 90% of cases.

Take the laptop for repair.
In this case all you have to do is source a reputable PC repair store and take it in for them to fix. (it should be fairly inexpensive).



Good luck.

Sep 02, 2009 | Toshiba Satellite P105-S9722 Notebook

1 Answer

How do i change the graphic display to my notebook when its currently set to a remote source. I turn the computer on and get no display at all, only a blank screen.


If by "remote source" you mean that you had a TV or external monitor connected to it at one point, your laptop has function keys that toggle these settings. You should have a function key (usually labeled Fn) in a different color on your keyboard near the bottom. Along your F-keys (F1-F12) you'll see some purple or blue symbols, one may look like two monitors or two rectangles separated by a line. With the laptop on and running, press and HOLD the Function Key, then press the monitor toggle key. If it doesn't work immediately, give it a second and press it again. Many laptops have multiple settings that you'll have to toggle through to get back to your "laptop screen only" mode.

May 13, 2009 | Toshiba Satellite P105-S6104 Notebook

1 Answer

Monitor...


you can connect laptop and tv with the help of s-video cable
and also after u make connection successful, another cable is needed
for audio to convert sound from laptop

Jul 27, 2008 | Toshiba Satellite P105-S6104 Notebook

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