Question about Dell Inspiron 1525 Laptop

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Adapter problem? Or is it the LCD?

Connector is loose I think. If the wire isn't curled a certain way it won't charge. Also, the screen goes completely dark sometimes, but the laptop is still running. If I hold a light to the screen I can see my applications still going.

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Well it's the backlight behind the LCD panel which is causing this problem for sure. Also u may need to check the inverter board found behind the LCD panel.

Posted on Feb 07, 2010

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Hi,

The charging problem could be the charger itself or the adapter. To check the adapter wiggle the pin to see if its loose. If its firm it could have a dry joint.
With the power supply you wil have to check the voltage output with a multimeter. The voltage will printed on the black box thats connected to the wires. If the meter registers nothing you will need to possition the wire (curl) the way you used to to check it again. If the power supply voltage registers then its the power supply that has to be changed.

As for the screen going dark that means the backlight is out. This means you will have to remove the inverter (power supply for the backlight). The inverter is located at the bottom of the screen behind the screen bezel (plastic surround) On the inverter there will be a coil with copper wires wound round it. Get a soldering iron and re-solder the points around the coil then reconnect it to see if it works. In 90% of cases this brings the inverter back to life and your screen lights up. The other 10% the inverter or backlight has failed and needs to be replaced.

In all cases this could mean taking the laptop apart and can be quite difficult if you're not savvy with a soldering iron, so my advice would be to either have a friend help you has experience in taking things apart and who can use a soldering iron, or have the laptop serviced by a reputable PC repair store.


Please post back if need anymore advice.


Regards.

Posted on Feb 07, 2010

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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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