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My PC has no video, "no signal" message on lcd... i know the monitor works as i have connected it to my laptop. i replaced hard drive, but still no signal. i also reseated the memory DIMS, but still no signal to monitor... Is there anything else i can check?

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  • 79 Answers

Try using a graphics card because the issue appears to be with the motherboard

Posted on Feb 08, 2010

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Posted on Jan 02, 2017

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I have bought a mew computer with a Sansung screem type LS19A300. It was working normaly and then a message "check signal cable" appeared. I checked all cables and nothing. So we changed the new...


Hi, what was the LCD displaying is that he is not sensing any signal from the computer video port that is why it is prompting "check signal cable". Have you tried checking the pins of your video cable from your LCD? if OK please plug in the cable again when your PC is already open to check that signal will pass thru and lets see what happen. If still the same, try to isolate it with laptop as external video if you have to check the LCD will work with other PC. If the same, replace the signal cable of your LCD if it is removable to further check the problem.

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How to troubleshoot my my benq t52wa that shows no signal detected


If the monitor is showing you a "no signal" message, it's almost certainly working fine. There's no video coming in from the computer, and that's likely where the problem is. Try another monitor first. It's possible yours isn't recognizing the input signal, but it's unlikely. I've only seen that happen twice I can remember. Chances are that another monitor will say "no signal" as well. Either the computer isn't starting up, or the video isn't working.

If you hear all the sounds of a normal startup (usually a single beep when the motherboard finishes power-on tests, hard drive activity shown by the front panel indicator, and finally the Windows startup sound through your speakers), then the video circuitry is bad. If the video is integrated onto the motherboard, you can install a replacement video card in an open expansion slot. If you already have a separate video card you can replace it.

If the computer isn't starting, you need to suspect memory, the motherboard, power supply or processor. You might also have a bad hard drive, optical drive or other device connected which is preventing startup. Begin by unplugging everything except the main parts: memory, processor and fan, power supply and (if used) video card. If the system starts up, you can identify the bad part by reconnecting them one at a time until the problem comes back. If the system still doesn't start with the minimum hardware, part substitution is how you'll figure out which is responsible.

It can be frustrating, but you'll get the thing going. Good luck, and thanks for using Fixya!

Oct 08, 2010 | BenQ FP737S-D 17" LCD Monitor

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Screen will not stay on, getting message no input signal


The message input signal means no signal is being feed to the monitor.
Check the cable use to connect the monitor to the video card.. fix and secure the connection.
If the computer is reading and you know its working, check the video card.
Turn off the CPU disconnect the video card from the motherboard and reconnect.
Try to open your CPU and see if it reacts with your monitor. If nothing happens replace your video card

May 18, 2010 | HP Vs17 17" LCD Flat Panel Monitor

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LCD monitor (viewsonic va720) "No signal"


You will need to disconnect the VGA cord that is connecting the monitor to the hard drive. Once you have that disconnected, try attaching another cord to determine if the cord is the issue. If you dont have another cord to test, then you will have to purchase another one from your local computer parts store and attach to determine if that is the issue you are having.

If the cord does not work, then you will have to take your monitor into a repair shop as there maybe an issue with the receiving port on the monitor.

I hope this was helpful and thanks for asking the experts.

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Monitor no signal


Your monitor cable is not properly connected to your computer, make sure you have it connected to the correct output on the back of your computer. If it is connected, make sure it is connected securely, not loose and half-cocked at the connector. If that doesn't work, try another cable.

Sep 15, 2009 | Dell E151FPp 15" TFT LCD Flat Panel...

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HP Pavilion zd8000 got my first horizontal line.


A horizontal line on your LCD display is either caused by the video chip on your system board or the LCD screen itself. Either way it will not cause you to lose data on your hard drive. It is a video problem.
By connecting an external monitor from a desktop PC to the back or side of your notebook and switching to it by using your function keys (see manual), you can see if the problem is also on the monitor (meaning video chip problem) or stays only on the notebook LCD (LCD problem).
The video chip problem means you will need a system board. The LCD problem means you will need a new LCD panel. In rare cases, reseating of the ribbon cable on the back of the LCD panel will fix the red line.

Jun 18, 2009 | HP Pavilion zd8000 Notebook

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Benq 19' LCD Screen 3 yrs old- no signal detected on brand new PC


Have a look at the back of your computer.

See if there is more than 1 video port.

If there are 2 ports try plugging the monitor into the other port....

Sometimes motherboards have internal video cards, in this case the video port is in among the USB ports, sound and mike sockets etc.

Look for a video port away from all those other things.

Apr 26, 2009 | BenQ FP71E 17" LCD Monitor

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What does this mean?


It means that the monitor is not receiving a signal from the video card of the computer.

Possible failures are as follows:

1. The monitor input cable is no longer connecteds to the video casd.
2. The computer is not powering on
3. The video card has failed
4. The input Select option of the LCD is set wrong

Jan 27, 2009 | Gateway 300 C PC Desktop

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Black screen for hp laptop


Hi,

Initially, a couple of ideas ou may want to explore:
  • hook an external monitor. Often there would be a VGA connector at the rear of a laptop specifically for this purpose. It would need a standard 15 video cable normally attached or with the external monitor. You may need to cycle through Fn + F? keys to enable the external monitor. F? would be the function key with the small monitor icon;
  • remove the hard disk of the erring laptop, connect it to a 2.5 to USB adapter and attach to a free USB port of a 2nd computer. it will be treated as an external storage device much like a thuimb/flash drive and therefore would allow copy and paste;
  • tap on the cover of the laptop, the one right behind the LCD screen anywhere on the sides, this is in the hope that it is a cold solder or loose connection;
  • run the laptop with the lid not fully opened;
  • slightly warp/twist the lid/LCD, it could just be a loose connection;
  • if the display works even just momentarily, then chances are that no major repair work is required. The bulk of the job would be in the opening and offhand, no major component replacement.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information. Good luck and kind regards. Thank you for using FixYa.

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First, check all plugs and make sure there are no broken or bent pins in them. If the projector you are using have a replacable cable try to replace it to see if the cable is the problem. (borrow a cable from a friend or relative first so you don't buy one if it is not needed.)

If that doesn't fix it, try to connect a different computer to your projector to see if that is better. If so, the output port on your computer may be bad.

Also try to hook your compuber to a different monitor to see if that works. If no computers are able to make a good picture on your monitor, the monitor is at fault.

The fact that you can change the picture quality by wiggling the cable, and that it starts to search for a signal suggests that the cable or the plugs are at fault, but having the wrong resolution set up on your computer may also affect the image quality. Again, try to use a different computer as a source to eliminate (or confirm) your computer being the problem.

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