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Dell laptop monitor black. Works with external monitor. Looking to find out how to check the hinge wireing or internal connections

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Please read here for your model,
more likely to have bad backlight inverter board, worst case will be the lamp assembly.

Posted on Aug 04, 2010


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Posted on Jan 02, 2017


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Can i just remove the monitor assembly toshiba laptop p5085d-s8935 and just use a n external monitor

You could do that. Here is an excellent guide to replacing that model laptop's lcd which will show you basically how to remove it as well.

Dec 07, 2012 | Toshiba Computers & Internet

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Laptop all whit screen

Dell Inspiron 1420 Notebook PC?

The white screen can be fixed. How?

Connect a VGA monitor to the laptop. Connect to the VGA port on the right rear. Example of a VGA Cable, and VGA connector,

You can use a CRT type monitor, (Looks like a small TV), or a flat LCD screen monitor that has a VGA cable.
By default the display should show on the external VGA monitor.

Press, and hold the Fn key down, and at the same time tap the F8 key ONCE.
Still no?
There are at least 3 display options available;

1) Internal monitor of laptop ONLY
2) Internal monitor of laptop AND external VGA monitor
3) External VGA monitor ONLY

Hold the Fn key down again, and tap once more on the F8 key.

No display on the external VGA monitor, means you have a bad graphics chipset. Replace motherboard.
Display does show on the external VGA monitor, means you have a problem with;

1) Video Cable
2) Screen Inverter
3) LCD screen

Video Cable:
The Display Panel Cable (Video Cable for Dell), connects to the motherboard by the left Hinge.
Goes under the left Hinge, and up into the Display Assembly.
It then connects to the Screen Inverter, and to the back of the Display Panel. (LCD screen for Dell)

From normal opening, and closing of the laptop, the Display Panel Cable may become pinched in the left Hinge.
This can cause;
A) The connection at the motherboard to come loose
B) The connection at the back of the Display Panel to come loose
C) Stretch the wires inside the Display Panel Cable's sheath, and damage the wires. (Break)

If you are lucky just the connection at the motherboard, and/or connection at the back of the Display panel, may have come loose.

Diagnoses is to NOT just look at the connections, but physically push the connectors of the Display Panel Cable, into the connector at the motherboard, AND back of the Display Panel.

Visually inspect the Display Panel Cable's sheath. Do you see any outward appearance of damage? This means the tiny wires inside may be damaged.
Replace the Display Panel Cable.

Remove ALL power. Remove the AC adapter (Charger), and Battery.
Remove the Keyboard Cover.

Unfasten the Keyboard, LEAVING the Keyboard Cable ATTACHED to the motherboard. Roll the Keyboard over, and lay it upside down on the Palm Rest Cover,

Two Philips head screws at top of Keyboard. After removing, lift the top of the Keyboard up a little, slide it a LITTLE towards the Display Panel.
DO NOT lift it straight up at first.
There are 3 plastic tabs on the bottom of the Keyboard, that slide into the Palm Rest Cover. If you pick it straight up you will break those tabs off ]

In Removing the Display Assembly, note where number 1 points to.
This is the Display Panel Cable's connection, TO the motherboard.

Note where number 2 points to. Those cables going to the Mini-Card Antenna, HAVE to be reconnected, right back to the SAME terminals on the Mini-Card. Make a mark on the cables, and matching marks on the Mini-Card.

Use the instructions in Removing the Display Bezel.
Use the instructions in Removing the Display Panel.

View the last illustration in Removing the Display Panel.
Note how the Display Panel Cable attaches to the Display Panel, and Screen Inverter

Number 2 points to the connection at the back of the Display Panel
Number 6 points to the connection to the Screen Inverter
The Black connector that is not numbered at the bottom, is the motherboard connector of the Display Panel Cable.

This is a better view of the screen Inverter,

Display Panel Cable checks out? Look at the screen Inverter. This small circuit board is located at the bottom of the Display Panel, and behind the Display Bezel. Closer look at link listed above.

Is the cable coming from the Display Panel Cable, plugged in tightly to it?
Does the screen Inverter look damaged?

Post back in a Comment, and we will go from there.

Jun 09, 2012 | Dell Inspiron 1420 Laptop

1 Answer

When starting up just get black screen?

1.Diagnose the problem with your computer. Watch the screen from the moment you hit the power button through the time it should take to boot into the Operating System.
Adjust the computer's contrast and brightness through their full ranges to make sure that the display settings have not been changed.
Reset the computer's LCD-External Monitor display with the LCD/External Monitor key combination and reboot the computer.
Continue to Step 2 if the screen is blank throughout the booting process.

2.Adjust the screen from its fully closed position to its fully opened position. Watch the monitor for any change from a blank screen to a display or vice-versa. If the screen flashes or cuts out, the LCD panel will need to be replaced. Skip to Step 5.

3.Skip this step if your computer does not have an external monitor output.
Connect your computer's external monitor output to a known good monitor and change the display from LCD to External Monitor (the keystroke combination is different for all notebook brands). Reboot the comptuer, if necessary.
If the computer does not display to the external monitor, the video card could be bad. Skip to Step 6.

4.Consult with a professional technician to determine the cost-effectiveness of replacing your computer's LCD if you are not knowledgeable in that area.
Purchase a compatible replacement LCD and install it yourself, or pay a professional technician to do so if you do not feel comfortable performing the repair.

5.Verify that the monitor connection cables are not loose or disconnected before attempting to replace it.
Replace the monitor yourself by removing the old monitor. Remove the hinge covers by gently prying them. Check if they are screwed to the computer before prying.
Find the monitor cable's connection to the motherboard. Turn your computer over and remove any plates that may cover the point of connection. Note the orientation of the cables before disconnecting them.
Unscrew the monitor from the hinges and gently detach it from your computer. Feed the new LCD panel's wires through the same path as the old wires, and reconnect them. Secure the new LCD's hinges and replace the hinge covers.
Power up the computer and check that it works. If it does not, recheck the wire connections.

6.Consult with a professional technician to determine the cost-effectiveness of replacing your computer's motherboard or video card if you are not knowledgeable in that area.
Purchase a compatible replacement motherboard or video card, and install yourself or pay a professional technician to do so if you do not feel comfortable performing the repair.

7.Replace the motherboard by disassembling the computer. Document every connection and be sure to retain all screws and small parts in order to reassemble the computer correctly. Reassemble the computer and power it up; check the keyboard to make sure that it has been reconnected properly.
Replace the video card by removing any covers or plates that hide the card. Remove the old card and install the new card in its place. Power up the computer to test the display.

Sep 05, 2011 | Dell Vostro 1500 Notebook

1 Answer

During startup screen doesn't show anything, but a grayish white. backlight working, cables ok, and seated correctly, no visible damage to inverter boards. one small black wire leading to built-in webcam...

connect an external PC monitor to the slot on laptop...
you will know where is the issue....
if the monitor works then there is an issue on the display of laptop....else some other issue....

Nov 01, 2010 | Dell XPS M1330 Notebook

1 Answer

The monitor does`nt work, but the computer still works,how can I get a Dell monitor to work with the T41 notebook. I have them connected,but the monitor stays black

This may be a defect in the graphics card, since the external monitor (is it properly connected to the VGA-connector and is the power on?) should be recognized automatically and display instead of the internal monitor. The behaviour of the laptop in case an external monitor is connected can sometimes be controlled via the BIOS, which is impossibile to do if the internal monitor or the graphics card doesn't work. I'm afraid that, if you can't reset the BIOS yourself, this may be a case for the repair service.

- Marinus

Sep 29, 2010 | IBM ThinkPad T41 Notebook

1 Answer

My Dell Vostro 1500 laptop screen just blacked out. The computer is still running and when connected to an external monitor, it works. Any suggestion on what to check?

your problem is easy to fix the cable from your lcd to your motherboard is disconnected,here is what you will have to do first remove the battery,the ac cable then if you are strong enough use your fingers to pry away the hinge cover off from right to left, and then remove it from the computer.You will see below a biege cable which is the conector to your motherboard unplugged.Plug it in and carefully replace the hinge the battery turn it on and you should see the dell logo.
Good Luck

Aug 26, 2009 | Dell Vostro 1500 Notebook

1 Answer

Laptop has black screen, woks when hooked up to external monitor

just re-connect LCD connector properly its a loose connections. check also inverter maybe loose.

May 29, 2009 | Dell Inspiron XPS M140 Notebook

1 Answer

Black screen

Hook it up to an external monitor, if everything works properly, then check the screen connections, one may have worked loose. Screens will go out without warning, so, if the connections are good and it works with the external it may be the screen. If the external doesn't work then it's an issue with the video card.

Jul 10, 2008 | Dell Inspiron 5160 Notebook

2 Answers

Inspiron 1150 screen is black

It is one of three things usually Bad cable at the hinge, Failed inverter board, or failed backlight. Probably inverter. Not to difficult to repair. Check cable first because it is inexpensive and easy. Check the inverter and replace if needed . Sometimes you can buy one used cheap with a bad motherboard and swap the top.

Jan 19, 2008 | Dell INSPIRON 6000 CENTRINO...

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