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No display My laptop stopped displaying the screen, I have replaced the hard drive when had it checked. Display came on after few days the same problem occurred. Then I was informed that the motherboard has some problem. Could any one help resolve this problem. Thanks N Shareef

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Reset your bios settings.
put away cmos cell for 15 minutes from mother bord.
then check if orblem remains still then u have change mother bord.

Posted on Jan 05, 2009

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Posted on Jan 02, 2017

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1 Answer

No display on Sony VAIO vpcf115

check the internal display cable connection "LVDS" cable,
maybe you had trouble connecting it back fully, or you damaged it durring the replacing of the MB

Jan 23, 2014 | Sony Computers & Internet

1 Answer

No display

Desktop or Laptop Computer

Test all power and data leads that attach to your hard drive IDE,SATA

the leads from your (motherboard to your hard drive) make sure they have secure dust free connections and are not faulty or just replace them they might be faulty

if its a 40 pin flat ribbon type it will be the first to fail

make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty

even something as small as a faulty electrical fan and its lead can cause you problems

computers need all power and data to continue through every working device and to have an end so any faulty leads will end up with a computer error

make sure your graphics card is securely seated with no dust built up or in the socket

if you remove your graphics check the socket to make sure its dust free

restart your computer then reinstall it this should activate found new hardware wizard

If the computer has run out of charge or is in hibernation or sleep mode,

if the screen is too dark, or if the display cable has come disconnected from the motherboard, the screen may appear black or fail to turn on.

To fix a blacked-out laptop screen, troubleshoot the screen settings, check the LCD connector and see if the computer is awake and receiving power.

hope this helps

Sep 09, 2012 | Intel D865PERL Motherboard

1 Answer

Horizontal black line at bottom of laptop screen/ Compaq Presario C700

Alan, let's diagnose;

1) Do you have access to a VGA monitor? (CRT style. Looks like a small TV)
How about a flat LCD screen monitor with a VGA cable?

Need to see if the problem is the graphics chipset, or the Video Cable, or inside the Display Assembly.

A) Laptop OFF, monitor OFF, connect the VGA monitor, to the VGA connector on the laptop. (Left side towards the Front)

B) Turn the monitor on. If a CRT type allow it to warm up.
Turn the laptop on.

By default (Factory settings), the display should show on the external VGA monitor.
IF not;

There are at least 3 display options;
1) Internal monitor of laptop ONLY
2) Internal monitor of laptop AND external VGA monitor
3) External VGA monitor ONLY

Press, and hold the Fn key down, (Second key from left on bottom), and at the same time tap once on the F4 key.
(The F4 key is the Display Toggle-Over key)

Still no display on external VGA monitor?
Hold the Fn key down again, and tap once more on the F4 key.

Display on external VGA monitor OK? Problem is the video cable, or inside the Display Assembly.

Line still on display? Problem is the graphics chipset, or it's mounting to the motherboard. (BGA surface mount)

Problem with Video Cable or Inside the Display Assembly:

Video Cable; Display Cable when referring to an HP, or Compaq laptop.

The Display Cable attaches to the motherboard, under the left side of the Keyboard, and towards the front. It then routes under the left Hinge, and up into the Display Assembly.

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

{ In the photo; On the right side there is a wide connector, (Top), and a small connector, (Bottom)
The wide connector connects to the motherboard. The small connector connects to the screen Inverter.

The connector to the far left connects to the back of the LCD screen}

Just from normal opening, and closing of the laptop, repeatedly, the cable can be pulled on. It can also be pinched in the left Hinge, and be pulled on.
This can cause two things:

1) Can pull the cable so the connection at the motherboard is loose, or loose at the screen Inverter, or back of the LCD screen. Or all three.

I have repaired a few laptops whereby this was the problem. I also have a few users on here, who reported this was the problem.

You have to remove the Switch Cover, and partially remove the Keyboard, to access the motherboard side connection, of the Display Cable.
You have to remove the Display Assembly, and open it up, to access the LCD screen side connection.

You CANNOT just visually inspect the connections, and assume they are plugged in tightly.
You need to physically, make sure the connections are plugged in tight.

The Switch Cover is just that. A cover.
The Keyboard has a Keyboard Cable, that stays attached to the Keyboard, and is connected to the motherboard connector.

Therefore, when checking to see if just the motherboard connection is the problem; you can just leave the Keyboard Cable attached to the motherboard, and fire the computer up after physically checking the motherboard connection.

{ Flip the Keyboard over, and lay it down on the Palm Rest Cover.
Excuse me. Top Cover for HP and Compaq }

With the LCD screen, and screen Inverter connections, you can lay the LCD screen down on your 'work' table, and try it. This way you can try it to make sure it is the problem, before reassembling the laptop.

Otherwise you will be removing the Display Assembly again, and opening it up, again.

[This will all make more sense as you read on ]

The Display Cable can also be damaged. Visually check the sheath of the cable. ANY apparent damage, may result in damage to the tiny wires inside the sheath. (Stretched/Broken)

Test the wires inside the display cable for continuity. This is done with a multimeter set to OHM's. (1K)
If you do not have access to a multimeter, perhaps take it to a 'Mom and Pop' computer store to have it checked. Should only cost a few bucks.

Display cable connections are tight/ cable checks out?
Problem is the screen Inverter, or LCD screen.

The screen Inverter is checked with a Sensitive multimeter.
Read fairly expensive,

Perhaps the 'Mom and Pop' computer store again.

{ A screen Inverter, and an LCD screen are a MATCHED unit. If the Inverter is the problem, make SURE you get the correct one. Same thing with an LCD screen. Make SURE you get the correct one }

Screen Inverter checks out? Problem is the LCD screen,

[ALL of the parts shown are just for examples. NONE are for advertising ]

To Add:
An LCD screen cannot produce light,

Click on the monitor icon. (I also would click on -> No thanks)

An LCD screen 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.
In the next example look at the last 5 photos,

The Compaq Presario C700 series of Notebook PC's uses a single CCFL.

A screen Inverter converts the power from the laptop, for the LCD screen, and Backlight.
90 PERCENT OF THE TIME, the fault is a bad screen Inverter.

This is a link to a free Service Manual from HP Support,

In the list click on -
HP G7000 Notebook PC and Compaq Presario C700 Notebook PC -
Maintenance and Service Guide

This is a PDF file. The computer you are using now has Adobe reader on it, which uses PDF files.
After you click on the above file name it may take up to 30 seconds, before the first page comes up.

In the Bookmarks menu to the left;

1) Click on the + sign to the left of -
Removal and replacement procedures
2) Click on the + sign to the left of -
Component replacement procedures

3) Click on one at a time -
Switch Cover
Display assembly
Page 58 for the screen Inverter.

A) Remove ALL power. Remove the AC adapter (Charger), and Battery
B) De-static yourself before working on the laptop. Perhaps there is a large metal serving plate (Unpainted), you can set on the table, or a large metal knickknack. (Unpainted) Touch before working.

C) Use a multi-compartment container, for the various screws you will remove.
Label each compartment for the area the screw/s come out of.
[If no multi-compartment container is available, you can substitute with a clean egg carton. Label each egg holder ]

SOME screws look VERY similar to other screws.
Advise do Not mix them up.

Need advice along the way post back in a Comment. I'm right here.


Jul 26, 2012 | Compaq Presario C700 Series Laptop...

1 Answer

Where can I find a schematic or instructions to open my toshiba satellite u205-s5067 laptop. I want to clean/replace my fan.

Taking apart a laptop to change the fan is a relatively simple task. Just keep track of where all the screws go and follow these steps:

1. Shutdown the laptop and remove the AC adapter. Disconnect any devices, such as a printer or external DVD-ROM or drive, that are attached to the laptop

2. Remove the laptop battery. Turn the laptop upside down, slide the battery release latch and then pull the battery out of the bay.

3. Unscrew the hard drive cover. Grab the hard drive tab and shift the hard drive to the left to unplug it. Lift the hard drive out of the bay.

4. Unscrew and remove the PCI memory cover, the optical drive cover, and switch cover.

5. Unscrew the two screws that hold the keyboard to the base, these are located in the middle of the rear panel. Flip the laptop over so it is right side up, open and remove the keyboard by using the keyboard release switches located above the keyboard. Next, unplug the Toshiba Satellite U205-S5067 Fan cable.

6. Close the laptop and turn it over so it is bottom up. Unscrew the display assembly screws located under the laptop screen hinges. Turn the laptop over so it is right side up. Open the laptop and unplug the display assembly cable and disconnect the wireless antenna from the display assembly. Unscrew the display assembly from the laptop base and remove.

7. Unplug the mouse pad cable. Turn the laptop over so the bottom side is up and unscrew the base screws which are located along all four sides of the laptop base. Gently remove the base of the laptop.

8. Turn the laptop over so it is right side up. Unplug the fan cable from the circuit board. Unscrew the screws holding the Toshiba Satellite U205-S5067 CPU fan assembly to the laptop. Lift the fan assembly out of the laptop.

9. Insert the new Toshiba Satellite U205-S5067 CPU fan assembly into the lap top. Screw the assembly unit to the lap top and plug the Toshiba Satellite U205-S5067 CPU cooling fan cable into the circuit board.

10. Reassemble the laptop by repeating the previous steps in reverse order.

Hope this helps.

Apr 05, 2011 | Computers & Internet

1 Answer

Hi everyone ..... i am using dg41rq from 22 months in 12 months motherboard is not working (no display) so i send it to the intel service center and they replaced .now in replaced motherboard when i use...

One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect your hard drive
Test the leads that attach to your ((hard drive from the motherboard)) or replace all the leads that attach to your hard drive including electrical extensions + IDE,SATA and the ones that attach from your ((motherboard to hard drive))
make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electrical extensions or just replace them they are probably old and faulty a computer needs its connections to have an end so any faulty leads will end up with a computer error

hope this helps

Jan 17, 2011 | Intel DG41RQ Motherboard CPU Bundle - ...

1 Answer

Hi there i have a sony viao laptop pcg-7121m, there is no power to the display so when i switch on the laptop the power button lights up but there the screen stays blank, how can i try and trace back the...

Try holding down the function button on the keyboard and tap the F key with the (O) symbol above it, Its the symbol for monitor. You may have to press them a few times. That will toggle computer from its external only monitor mode. If not then hook up an external monitor to the computers vga jack and try again. If you get the external monitor to work that way and not the built on display then the built on display will need replacing and if it does not go to working at all then its most likely a motherboard issue. If the external display does work then you can continue to use it that way until you get the screen repaired/replaced.

Aug 25, 2010 | Computers & Internet

1 Answer

Hi, i have an HP Pavilion dv2000 & it had recent motherboard problems, so I had it repaired in the HP Service Center. They replaced the motherboard & so far, everything was okay until yesterday....

Yes, the GPU is faulty. either replace the systemboard or reflow the GPU. Second option is cheaper and you can do it yourself. There's a link for a diy guide to fix that issue.

does your screen look like this?

Jan 30, 2010 | HP 417035-001 - HP Pavilion dv2000 Series...

1 Answer

Replaced motherboard battery, now screen display is too big

using you external monitor go to display settings , select monitor tab, open it , select monitor #1,reset to defaltor smaller resoloution

Jul 05, 2009 | Computers & Internet

2 Answers

Compac dv 2000 laptop

first you have to know what is goin on with your laptop, is it starting up to the bios? or continously restarting, or rebooting or totally not statring at all. please specify what exactly happened to your pc to be able to know what if your board is not working at all
have a nice day


Jun 12, 2008 | Computers & Internet

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