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Toshiba Satellite C655D-S5518 show black screen

My computer Toshiba Satellite C655D-S5518 had a fall, the screen broke, I Replace the screen with a new, but equally no picture on the screen, it looks as if it were turned off, but if I connect to the VGA screen this if pictured outside the windows boot perfectly, everything is fine, the only problem is that the screen has remained off. Someone could help me .... Thank you very much!

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Most probably one of two problems causing this:

1. Replacement screen has bad LED diode (not likely the problem).

2. Either you didn't get cable securely attached to replacement screen or (more likely) the other end of the cable detached from the motherboard when the computer fell and the original screen broke. I recommend carefully rechecking both ends of the cable connection.

Posted on Dec 30, 2012

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SOURCE: Toshiba Satellite L35 screen color turned to pink.

If you have a LCD-screen, not an old-style CRT-screen, it is the data-cable, and its connections, that are not transmitting one of the 3 "primary" colours, e.g., mix red & blue & green to get white,
but mix only two of those colours, and you could get pink,
because the mixing is an "additive" process.

If you mix NONE of the 3 primary colours, you should get BLACK.
If you see GREEN, you're seeing ONE of the primary colours.

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SOURCE: Gateway notebook goes BLACK when connecting new lcd tv to laptop

try setting the frequency down to 60hz and the resolution before you connect. then if it works you can set it up again with a setting the TV likes

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Why is my toshiba satellite c655d-s5200 screen is black and i can faintly see


Okay. Got a bright flashlight, and some tape?

OH I'M JUST KIDDING!

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 a series of LED's.
Light Emitting Diode.

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,

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

View the last 11 photos ]

A screen Inverter converts the power from the laptop, for the LCD screen.

The Toshiba Satellite C655d-s5200 uses LED's for the Backlight, and No screen Inverter,

http://www.laptopscreen.com/English/model/Toshiba/SATELLITE~C655D-S5200/

Which narrows your problem down to two possibilities;
A) Problem with the video cable
B) Problem with the LCD screen.

I state LCD screen, because you won't be replacing the LED backlighting. You have to buy the entire LCD screen assembly, as shown in one example above.

(Example is shown for reference, not advertising. You may find a better deal from a reputable dealer, also)

Video Cable:
The Video Cable is attached to the motherboard, under right about at the number 6 key, on the Keyboard.

It then goes across to the Left Hinge, and up into the Display Assembly.
From there it goes to the back of the LCD screen.


From everyday normal opening, and closing of the laptop over time, the video cable may become pinched, and pulled on.
This can create a loose connection at the motherboard side, and/or LCD screen side.

It can also cause damage to the video cable. If the sheath of the video cable shows visual apparent signs of damage, the wires inside may be damaged also. (Stretched/Broken)

Laptop off, ALL power removed, (AC adapter {Charger}, and Battery), I suggest checking the motherboard side connection first.

A visual inspection will Not do. You need to physically see, if you can plug the motherboard side plug of the video cable, into the connector on the motherboard.

A loose connection that is not apparent to the ***** eye, is all it takes to have a problem.

You can click on any photo to enlarge,

http://www.irisvista.com/tech/laptops/Toshiba-Satellite-C650-C655/disassemble-toshiba-laptop-1.htm

http://www.irisvista.com/tech/laptops/Toshiba-Satellite-C650-C655/disassemble-toshiba-laptop-2.htm

http://www.irisvista.com/tech/laptops/Toshiba-Satellite-C650-C655/disassemble-toshiba-laptop-3.htm

Stop on Step 22. Access to the motherboard side of the video cable.

A word on the Keyboard Cable, and it's connector on the motherboard; (Steps 9, 10, and 11),

The Keyboard Cable stays with the Keyboard. It removes from the motherboard connector. The Keyboard Cable has NO plug, or connector on the motherboard end.

The Keyboard Cable is a FFC. Flat Flex Cable.
It has flat gold plated contact strips on the motherboard end.

The motherboard connector is a ZIF connector. Zero Insertion Force.
In Step 11 you can plainly see this connector.
Has a large white rectangular BODY on bottom.
The smaller rectangular shaped piece on top is the Locking Bar.

The Locking Bar does NOT completely remove from the Body.
If it does it is broken, and means motherboard replacement.
Hence why I am being so detailed.

I am sure you use great finesse, but wanted to advise you in advance of the 'danger'.

The Locking Bar is moved towards the LCD screen, and as advised about 1 millimeter. ( -> O <-)
There are Tabs on the Locking Bar. One on each side. Usual procedure is to use your thumbnails on these Tabs, and ease the Locking Bar forward.

Now gently tug on the Keyboard Cable. You may have to gently move it side, to side, to break the Keyboard Cable loose. They sometimes get stuck over time.

Pretty stiff? Better check to see if you have the Locking Bar fully unlocked.
The Keyboard Cable MUST go back in the same position, and through the same plastic Latches and Channels.

(As do all the cables, or you may pinch them, and also will not be able to get the laptop back together correctly again)

Make a mark on one side of the cable, (Away from the gold plated flat contact strips), and a matching mark on the ZIF connector of the motherboard, if you need to.

You can slip the Keyboard Cable back in, Ram Memory, DVD drive, and Battery, and reconnect the AC adapter, to see if this was the problem.

Still no?
Check the LCD screen side connector of the video cable. Is it tight?

http://www.irisvista.com/tech/laptops/Toshiba-Satellite-A665-A665D-A660-A660D/remove-replace-lcd-screen.htm

LCD screen connected, turn the laptop on.
Was this the problem?
No?

Even if there are no apparent signs of damage, you may wish to take the video cable down to the nearest 'Mom and pop' computer store, and ask them to check it for continuity. This way you can see if any wires are broken inside. (Labor charge may be free to $5)

(My thinking is if you go to a large computer repair shop, they are going to want to repair the laptop, or sell you an LCD screen, or a new laptop. "Oh that old thing? For 2995 I can put you in the seat of this baby!" )

Or since the video cable is very economical, you may wish to just replace it.
Just one example from a quick search,

http://www.ebay.com/itm/Toshiba-Satellite-C655D-6017B0265601-LCD-Video-Cable-Genuine-OEM-Laptop-Tested-/290753862740?pt=US_Video_Cables_Adapters&hash=item43b247dc54

[Black end on right is motherboard side, gold colored end on left is LCD screen side ]

Video Cable ruled out your problem is the LCD screen, or to be more specific, the LED backlighting.
Replace the LCD screen.

For additional questions please post in a Comment.
Regards,
joecoolvette

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