My computer monitor keeps shutting off. I have an Acer monitor so when it turns off it says no signal and blacks out. It usually does this when I shut the computer down but now it is happening randomly.

usually when you turn a monitor on it will display the company name of that monitor. Then after that it waits for the signal from the computer if there is no signal coming from the computer it usually has to do with the video card

Connect the monitor to a different computer, to see if the monitor works at all.

Connect a different monitor to your computer, to see if your computer really is "sending" a video-signal through the "data" cable. If not, then either the data-cable or the video-card inside the computer is faulty.

Its your computer/cable. Either the cable is damaged or the the display chip of your motherboard is defective.

Replace your monitor power cord

You are seeing the monitor's splash screen that tells you the monitor is OK. It is not receiving a signal from the computer. That's the problem

This means the monitor believes it's not connected to the computer. Verify the cables first of all. Then try booting in safe mode (F8 key at PC startup) in order to verify that the PC is sending data to the proper video port (you might have a dual VGA / Digital output, for example, and the monitor might be connected to the wrong PC port). Quite often, a "bad signal" will be the same of "no signal"; and you can have a bad signal if the monitor resolution on the PC is set too high. This could happen if you installed a high-resolution capable monitor, and then replaced it with a not-completely-plug-and-play, lower resolution one. The PC would keep sending hi-res signals to a monitor which can neither interpret them, nor tell the PC "please slow down". To check this last possibility, reboot your computer while the monitor is ON. When PCs reboot, they usually drop back to standard VGA signaling, which all monitors understand. If the monitor abruptly comes to life and displays a boot screen, then goes No Signal again after several seconds, you've got a resolution issue; get in Safe Mode with F8 key at boot, and modify the screen properties (right-mouse button on the desktop, then Properties).

If everything else fails, try also connecting the monitor to another PC or laptop, to see if it works there.

Check your connections to the PC. Make sure that they are nice and secure. If there is a resolution problem setting it should display the boot process and then go blank after starting the operating system.

Try another monitor on your computer. If you get video with another monitor then you know that your original monitor is bad. If you don't get video with another monitor then you know its something with the computer.

If the computer is the problem. Try reseating the memory and CPU. and also make sure the computer has no dust or dirt in it. If you still can't get no video then the motherboard is bad and would need to be replaced.

The interface between the monitor and the cable might need replacement. Please check it.

can you test your monitor on another computer to verify the monitor is at fault? If the monitor is at fault its time for a new one, factory warranties on monitors are usually 1 year unless you purchased an extended warranty.Otherwise repair is usually more costly than buying a new one.