No signal on startup

That message comes up when the monitor doesn't get a signal from computer, and enters power save mode until computer comes on. This usually means that the computer's not starting up when you turn the power on. It may also mean that some problem has occurred with the computer's video circuitry.

Begin by checking that the computer is actually starting up properly. Look for the normal startup signs (lights on the computer showing power and disk access, fans running, sounds through the speakers). If you're sure that the computer is working and getting into Windows, try another monitor. This will tell you if the monitor is bad or if there's a video issue with the computer.

Most monitors will behave that way if they don't get a signal from the computer so there's nothing to display. A quick check of the monitor itself is to disconnect the signal cable from the computer and then turn the monitor on. Most monitors will display some kind of a message that there's no input and to check your cable connection. Then the power indicator changes color as the monitor blanks out.

You will probably find that your computer isn't starting up when you turn on the power. A common computer problem is that it will turn on when you press the power button, showing a power light and you'll hear the fans inside start running, but it never actually starts running. Then there's no video to the monitor and you see the trouble you described.

The monitor may still be bad. If everything seems to be starting normally and you hear the Windows startup sound through your speakers, but the display stays blank, try another monitor. If that one works, you'll need to have the bad one serviced or replace it. If the test monitor is also blank, the video circuitry in your computer has failed. If the video is built into the motherboard, you can install a plug-in video card as a replacement.

If the computer is turning on but never starts running, that can be a pain to figure out because several things can cause the trouble. The most frequent causes are a bad power supply or motherboard. Bad RAM or a defective drive or other device connected to the motherboard can also keep the board from starting up. The processor itself can fail, but that's not common. I start by removing everything except for the power supply, processor and fan to see if the motherboard is starting. If the motherboard doesn't give a "no memory" error (usually a long beep), you need a power supply or motherboard. Otherwise, the basic hardware is fine, and you can start replacing parts until the trouble comes back, and then you'll know what caused it.

Good luck, and thanks for using Fixya!

If your fans power up but you see no image, then your computer has failed its startup test.
Now you have to find out what the problem is.
Start by opening the case and disconnecting everything but the keyboard, CPU, memory, and video. Now try to start it. If you still have no signal, it might be your video card if the monitor shows a message telling you there is no signal. Memory could also be a problem.
If you get a message telling you there is no boot device, then turn the computer off (push in the switch for about 7 seconds) and connect the hard drive. Now try to boot. If it works, then suspect the CD drive.
If after doing all this you still get no signal no matter what you do, and if the video is part of the motherboard, you're probably looking at a new motherboard.
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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!

Your monitor is most likely fine. That message is the monitor telling you it's not getting any video signal from the computer.

If you're hearing all the sounds that go with a normal startup (usually a beep from the motherboard, then hard drive activity, finally the normal Windows startup sound through the speakers), and seeing that message, then you may have a monitor problem. You can try another monitor as a test.

The trouble is probably that the computer is turning on, but not actually starting up. This may be due to power supply, memory, processor or motherboard problems. Or one of the drives or expansion cards connected to the motherboard may be keeping the system from starting.

Make sure the memory modules are firmly seated in their sockets, and disconnect everything else but the power supply. If the motherboard, processor and memory are working, the system will start and you'll see something on the monitor. Then you can start reconnecting parts and see when the problem returns.

If the monitor comes on and displays a message like "no input signal" or something similar, it's working properly but there is nothing coming from the computer. People often think that the computer is working and the monitor is at fault, when in fact the computer isn't starting up.

When you turn on the computer, do you hear the normal sounds of the power supply fan running and the hard drive spinning? Most computers will give a beep when they turn on and the motherboard finishes some startup checks. Do you hear that? Do you ever hear the normal startup sounds that mean Windows is actually running?

If you are convinced the computer is starting and booting into Windows, I would suggest you borrow a known good monitor to use as a test. If it works, that obviously means yours is bad. In most cases there's nothing you can do to repair a monitor yourself beyond checking for loose connections, bent pins in the signal cable plug, or a damaged cable.

If a known good monitor still has no image, the computer is at fault. Either the video card or integrated video isn't working, or the computer isn't actually starting up. In any case, that's where you would need to start looking for the cause.

Hope this helps you along the way to solving the problem. Thanks fo using Fixya!

You see "Signal Out of Range" does not mean you cannot go to Safe mode or see startup messages. It shows up when you dont have a display. The refresh rate of your monitor is a little slow. So when you wana go to safe mode, press the Power button and start pressing F8 option and you will get the safe mode option and you will see startup messages when you will get one. Your computer is perfect. :)

All the best.

Regards,
Shrey

No signal means, monitor has not been connected. (for crt s) and, on startup (for lcd s) . Easiest solution should be, PLEASE REMOVE AND PLACE THE RAM TIGHTLY AGAIN. i hope, it will solve the problem, if you have recently traveled with your cpu.

The monitor isn't getting a signal from the computer, which is why the power indicator goes orange. There are two possibilities:

1) The computer isn't operating correctly. It may not be starting up at all when you turn it on, and you have a "no boot" problem to solve, or

2) The computer is working properly, shows all the signs of normal startup (hard drive activity, Windows startup sound from speakers, etc.). but video isn't reaching the monitor. There may be a problem with the video card (or on the system board if it's integrated video). Or the monitor itself is bad and not detecting the video. You can test this by connectng a known good monitor.

Usually means that the computer is not sending a signal out the the projector via the monitor cable. Most Windows based laptop computers allow you to connect to a second monitor by pressing the Fn + F7 or F8 key, once to allow just the projector, twice to allow both the projector and laptop screen and three times back to only the laptop.