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Problem with display

My motherboard is not connecting to keyboard(power passes once in key board but it is not activated) and no display is shown on monitor.monitor looks as if it is in standby mode.

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  • subashgurram Feb 18, 2008

    915GAV intel P4 motherboard

  • Ariyo Ayomide Oct 08, 2012

    it means there is no power in d system, check d current flow

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Check d power nd power current on d mother board

Posted on Sep 24, 2012

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Pc slalu restart sendiri,tibe2 hang,x boleh nak start windows

Posted on Nov 09, 2008

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  • 56 Answers

Check all cables & joining of systems. Check the jumper of your motherboard.

Posted on Feb 18, 2008

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PC Freezes During Boot and at the BIOS Screen, EVGA P55 Classified 200


Beep Code Descriptions


1 short beep Normal POST - system is ok
2 short beeps POST Error - error code shown on screen
No beep Power supply or system board problem
Continuous beep Power supply, system board, or keyboard problem
Repeating short beeps Power supply or system board problem
1 long, 1 short beep System board problem
1 long, 2 short beeps Display adapter problem (MDA, CGA)
1 long, 3 short beeps Enhanced Graphics Adapter (EGA)
3 long beeps 3270 keyboard card

Aug 30, 2012 | Evga P55 Classified 200 (160LFE659KR)...

1 Answer

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


http://h10025.www1.hp.com/ewfrf/wc/product?product=3559331&lc=en&cc=us&dlc=en&lang=en&cc=us

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.

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

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,

http://www.batterycentury.com/compaq-presario-c700-cable-p-212772.html

{ 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,

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

Perhaps the 'Mom and Pop' computer store again.

http://www.batterystyle.com/compaq-presario-c700-inverter-p-261900.html

{ 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,

http://www.screentekinc.com/Compaq__Presario__C700_Series-series-laptops-lcd-screens.shtml

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

To Add:
An LCD screen cannot produce light,

http://solutions.3m.com/wps/portal/3M/en_US/NA_Optical/Systems/BehindTheScenes/Optics101/

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,

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

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,

http://h10025.www1.hp.com/ewfrf/wc/manualCategory?cc=us&dlc=en&lang=en&lc=en&product=3559331&

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
Keyboard
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.

Regards,
joecoolvette

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

1 Answer

Asrock 3 Beep Code k7vm2 Problems & Solutions


check the leads that attach motherboard to hard drive make sure they have secure dust free connections

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

verify that the keyboard is connected properly to the computer by turning off your computer and then disconnecting and reconnecting the keyboard to the computer

Ensure that there are no stuck keys on the keyboard.
If all keys appear to be ok and you have a standard desktop computer with keyboard, turn the keyboard over and gently hit the back of the keyboard to loosen any dirt or hair that may be stuck in the keyboard.

Bad keyboard

Try another keyboard on the computer to verify that the keyboard has not gone bad.

Bad PS/2 or AT port

If all of the above solutions are not able to resolve your issue it is likely that the port on the back of the computer may be bad and the motherboard or I/O board may need to be replaced.

hope this helps



Jun 20, 2012 | Asrock Motherboards

1 Answer

My pc is booting but no display


Did you check your monitor with other system or individually. If it works fine in these conditions then the issue belongs to your pc.
First of all, you have to confirm that is it the problem of VGA itself or the motherboard. For this, you have to see that does system beep when you start it because system with beeps having the error and the beep sound with continuous or 2-3 beeps relate with different issues. I am going to write down the beep conditions.

1 short beep Normal POST - system is ok 2 short beeps POST Error - error code shown on screen No beep Power supply or system board problem Continuous beep Power supply, system board, or keyboard problem Repeating short beeps Power supply or system board problem 1 long, 1 short beep System board problem 1 long, 2 short beeps Display adapter problem (MDA, CGA) 1 long, 3 short beeps Enhanced Graphics Adapter (EGA) 3 long beeps 3270 keyboard card


best of luck!

Mar 13, 2012 | Gigabyte 7VM333M-RZ (GA-7VM333M-RZ)...

1 Answer

My HP Pavillion keyboard lights up but the screen is blank what can i do?


Press num lock key of key board if num lock led is on/off then your cpu gives display to monitor Then make sure monitor cable is connected properly to cpu vga port.
When you power up the cpu press F8 key then enter in "enable vga mode" Then go to start->control panel->display->settings.
Change screen resolution to 1024*768 then apply and ok.
Then check.
But if num lock led is not on/off and left constant then you need to open cpu cabinet.
Refix RAM memory.Pull cmos cell from motherboard for 10 minutes.
Clean dust from all parts.
Reattach processor and it's fan.
Make sure motherboard is not ground with cabinet.
Open motherboard from cabinet and try outside of cabinet.
Let me know if you need further assistance.
Thanks for using FixYa.

Dec 24, 2009 | HP (D7580-60003) Motherboard

1 Answer

Erro sound/pip when ibm 8310 netvista starts, no error message are show on the screen, the screen are black.


how many times it beeps is an indication of the problem
1 short beep
Normal POST - system is ok 2 short beeps POST Error - error code shown on screen No beep Power supply or system board problem Continuous beep Power supply, system board, or keyboard problem Repeating short beeps Power supply or system board problem 1 long, 1 short beep System board problem 1 long, 2 short beeps Display adapter problem (MDA, CGA) 1 long, 3 short beeps Enhanced Graphics Adapter (EGA) 3 long beeps 3270 keyboard cardhope this helps.

Sep 14, 2009 | IBM (09N5424) Motherboard

2 Answers

Laptop keyboard not working when LED Power board is connected.


I agree. Your best bet if you don't know what you are doing is to find a repairer.

Jul 07, 2009 | Intel 430180-001 - HP Pavilion dv8200...

2 Answers

My ECS 915 G-A elite group motherboard doesnot display anymore on the monitor..


have you tried to isolate what the cause of the problem? first check the video card if is properly inserted into the slot, and check the memory, and cable from CPU to monitor if it is connected properly. then boot your system. And try to observe this beep error code this might help you locate where the problem is.

short beep System is OK
2 short beeps POST Error - error code shown on screen No beep Power supply or system board problem Continuous beep Power supply, system board, or keyboard problem Repeating short beeps Power supply or system board problem
1 long, 1 short beep System board problem
1 long, 2 short beeps Display adapter problem (MDA, CGA)
1 long, 3 short beeps Display adapter problem (EGA)
3 long beeps 3270 keyboard card

thnk you.

Nov 29, 2008 | Motherboards

1 Answer

Motherboard installation


Hello mecompe,

If you installed an AGP graphics card before your fist boot of the system, you will not receive display. By default the onboard graphics is set to boot display. (If this is the case, remove the AGP graphics card & boot the system). The Asus P4SGX-MX can only use a 4x AGP 1.5volt (only) card.

There is an order of sequences to perform before installing/ adding an AGP graphics card on to the board when the board also uses an integrated graphics card.
First, shut down the system & unplug the power supply from the PC. Connect your monitor to the VGA port at the rear of the board. Remove the AGP card. Re-connect the power supply & boot the system. You should have display? Re-boot the system. As the system starts up press the delete key on the keyboard every 2 seconds. The bios main menu will load. (Open your manual). Go to
section 2.4.3, page 2-20 under Advanced, PCI configuration. Set Primary VGA bios to
[AGP VGA Card]. Save the bios & exit. The system will auto restart. Press & hold the power on/ off button on the PC case until the system shuts off. Unplug the power cord from the PC. Insert the AGP card into the AGP slot. Connect your monitor to the AGP card.
Check all internal data & power cables, (Incase something came loose). Re-connect the power cord & boot the system. You should have display! Install your video software.
If your using the integrated VGA PCI graphics card, go over the bios settings page 2-18 & 2-20.

Need the Asus manual? Click this link;
http://support.asus.com/download/download.aspx?modelname=P4SGX-MX&SLanguage=en-us

To view the manual you'll also need Adobe PDF reader, click this next link for Adobe.
http://www.adobe.com/products/reader/

(The green led (light), means standby. The board is receiving 5volts DC.

If you still do not have display just let me know.
Good luck mecompe!
Mike



Oct 28, 2008 | ASUS P4SGX-MX Motherboard

1 Answer

ASUS COMPUTER PROBLEM


Hello owners of the Asus P5S800-VM motherboard. This Asus board uses an integrated PCI graphics card. (That means it’s built into the board, you can not see it. Its part of the north bridge SiS661FX chipset). Everyone will need their manual so you can follow my instructions. If you no longer have your manual, please click on the ASUS P5S800-VM link below. A pop-up windows will open & you will need to choose the operating system from the dropdown menu. Than click Search.
http://support.asus.com/download/download.aspx?modelname=P5S800-VM&SLanguage=en-us
This downloadable manual can only be read with Adobe reader software. If you need Adobe's software, you can download it from Adobe at this next link: http://www.adobe.com/products/reader/
Shut down your systems; unplug the power cord from the PC's power supply. Open your case.
Please remove the AGP video card from the board; if any have one has one installed. (If you do not you will not receive display on your monitor. Once removed you now need to clear the bios/cmos.
On the board find the cmos/bios jumper as shown on page 1-21. Move the jumper to cover pins 2 & 3, count to 15 & move the jumper back to pins 1 & 2. One this is done. Close your case. Plug the power cord back into the power supply. Now we need to enter into the bios. Boot your PC & press the Delete key on your keyboard every 2 seconds. The bios main menu will open. Read the instructions at the bottom of the menu. This will show you how to move about while in the bios using your keyboard. (Can not use the mouse in here). Go to the title Advanced. Open "Chipset" page
2-17. See manual section 2.4.3 page 2-20. Change Primary Graphics Adapter to [AGP]
Save the bios & exit it. The system will auto restart. Press & hold the case power on /off button until the system shuts off. Unplug the power cord from the power supply. Open your case. Insert your AGP card. Make sure it is seated evenly & fully. Re-check all power connections & data connections before closing the case. Re-connect the power cord to the power supply. Boot your PC. You should have display. Install your graphics cards software. Check windows for any updates.
Life should be good. The ASUS P5S800-VM can only use a 1.5volt AGP card & nothing else. Check the manual for your AGP card & make sure it is 1.5v compatible. If its voltage is higher you will not receive display. This next link will show what a 1.5v graphics card looks like. Notice the copper contacts & its separation. Turn to manual page 1-20 for another 1.5v card with more than two separations.

Good luck everyone!
Please vote.......
Mike

Sep 13, 2008 | ASUS P5S800-VM Motherboard

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