My monitor is saying" No Signal" and has a black screen.

the problem is not on the monitor your system unit is the problem...maybe the RAM memory,video card or very high resolution try to load in other monitor and down the resolution to 800 X 600..

it means that the monitor is not receiving any signal from the cpu, check the cable that goes from the tower (cpu) to the monitor

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 blue light flashing means there is power to monitor bu NO video signal. No Analog or digital Video . analog is the regular plug for PC to Monitor, the other is HDMI digital or other digital. Check signal digital/analog means again: No video signal from PC detected.

Daddy

I'm thinking your video card is sending a signal the monitor doesn't recognize.
You'll need to start the computer and hit F8 until you get the black and white menu. Choose the VGA mode and it should work well enough for you to adjust the refresh rate or the resolution to get the monitor to work

might be something wrong with your monitor's data cable

steve, i dont think there is any problem with monitor. restart ur pc in safe mode, change resolution to 1440X900.

chack your ram
your display cord may be damaged or loose chack it

turn off the computer and get a can of compressed air blow out all the dust and make sure everything is tight put back together and see iff it works. geek squad charges 99.99 to do this in store.

You have to use the FN key and F5 to change between the LCD screen and the external monitor. It may be F8 also, depending on the laptop model.

Look on the F keys for a little picture of a monitor.

Once you have found it, hold the FN key and tap the F key and it should switch to the external monitor.