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How can I get a signal on my LCD monitor?

November 7, 2010 at 10:06:16
Specs: Windows XP
I am using an LCD TV as a monitor. It was working but now I'm getting "No signal" and a blank screen even after setting the monitor to PC. Can anyone help?

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November 7, 2010 at 10:34:32
Do you see anything during the POST, start up cycle?

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November 7, 2010 at 11:32:47
Your TV / monitor must be set to the proper input source - which one depends on which way you have the video output from the computer connected to it. E.g. It may be PC if you're using a VGA port (15 pin D-sub) connection, or it may be something else if you're using a DVI port connection, and it will probably be different if you're using a HDMI connection.

If you're sure that's right....

If you have no other display connected to the computer, or if you do but it has no video either......

"Do you see anything during the POST, start up cycle?"

You haven't mentioned anything, so far, that indicates your computer is actually starting up, and if it isn't, you would probably get that "No signal" message, when the monitor is connected to a video port on the computer and on the TV/monitor that should produce video.

See response 2:

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November 7, 2010 at 13:17:54
I have checked the cables (15 pin) . This worked on PC setting before. I'm not really sure what you mean by the Post start up cycle. All I see on the monitor is "No Signal" I can set it to pc HDMI etc. but then the screen turns white . You're probably right ...the computer is not starting up. How do I get it to do that? Thanks for your help.

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Related Solutions

November 7, 2010 at 13:51:19
Is the power led on the computer lighting up?

Can you hear that the CPU fan and power supply fan are spinning?

Is the hard drive activity led blinking like it usually does while booting the computer ? (If you normally need to logon to Windows, it will stop blinking shortly after the boot gets to that point.)

If those things are all okay, does your desktop computer have both onboard video (built into the mboard) and a video card in a mboard slot ? If so, you will probably get no video from the video port for the onboard video - the one in the same I/O area as most of the other ports on the back of the case. You must plug the monitor into the video port on the card in a mboard slot.

"Do you see anything during the POST, start up cycle?"

POST = Power On Self Test.
All computer's bioses go through a sequence of background tests - a POST - while booting in the very first part of booting - if those tests are successful you hear a single beep from the computer's mboard. Do you hear a single beep?
If you don't, do you hear a different pattern of beeps ?
If you have video while booting, you will see some text and possibly graphics on the screen before Windows (or whatever operating system) loads - do you see anything ?

In some circumstances, you will see video while booting BEFORE Windows loads, but there will be NO video AFTER Windows loads - is that your situation ?

No video is a common symptom of a malfunctioning system. Usually there's nothing wrong with your monitor or the video adapter - something else is wrong.

E.g. Failing or dead power supplies are common.
When they are failing, leds may come on, fans and hard drives may spin, yet the computer will not boot all the way. The hard drive activity led either does not come on at all, or it comes on and stays on.

Have you just been messing with the ram ?

Installing ram that is NOT compatible with using it in your mboard, or a poor connection of the ram in it's slots, can also cause it to NOT fully boot.

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November 7, 2010 at 16:10:27
Ok hard drive is working fine. I am using the old monitor now. When I switch the old monitor to the LCD TV the computer is sending a signal to it. ??? It was for the last couple of months.??

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November 7, 2010 at 16:24:41
The hard drive spinning doesn't necessarily indicate the computer is working properly.
Is it blinking it's led normally ?

Please answer ALL of the questions in response 4.

If you don't want to do a lot of typing, copy and paste the lines you want to answer to Notepad, then copy and paste them into your reply post.

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