MONITOR WON'T STAY ON. not connected message then it goes off

If the monitor is not working then it should not be related to the camera. Do you see any error message on the monitor? Try unplugging it from your computer and tell me what you see on the screen.

1. CRT or LCD?
2. Do you have an image of any kind for that 45 sec.?
When it drops out after 45 sec, do you have any strange behavior as you look at the screen (colors, blinking, lines, squiggles, noises, smells)?
3. When failing, does the power drop out (ON light goes OFF)?
How long do you need to wait until you can turn it ON again?
4. What is the status of your screen saver/power saver? 45 sec seems pretty short but it's still possible.
5. What does the manufacturer's website have to say about this problem? What do other users have to say when you search for your model?

I know these are just more questions but your question is too generic to offer specific comments that might be more useful.

Change display settings in energy management to NOT turn off when closing the laptop

CHECK IN BIOS MODE ,THIS PC NOT GOES TO STANDBY SO PROBLUM IN YOUR OS .FORMATE PC NOW CHECK .

What to you mean by Monitor won't go on? Are you saying the power on the monitor will not turn on? Are you saying the Monitor is on, but there is nothing showing on the screen? Also it would help if we know what kind of computer and what operating system.

What to you mean by Monitor won't go on? Are you saying the power on the monitor will not turn on? Are you saying the Monitor is on, but there is nothing showing on the screen? Also it would help if we know what kind of computer and what operating system.

check your video cable ends for bent pins or debris, then make certain that they are plugged in straight and tight.

Power up issues on the T220HD monitor are caused by a failure of the capacitors on the IP-49135b power supply board that this unit uses. The repair is easy, you just need to replace the 7 failed capacitors and the unit should be as good as new. Here is a link to some information showing what needs to be replaced to repair the power supply board.

http://www.ccl-la.com/catalog/product_info.php?cPath=21_33_68&products_id=217

I hope this helps.

press in the three buttons on the monitor ( + , - , and menu) at the same time , connect the power cable, that will reset the monitor to the factory settings

if you see that is helpful please don't forget to vote me

best regards

Try to disconnect the monitor and check if the message to connect the cable stays on the screen. I will need more description to solve this. Like Is the monitor's power ON and the display goes off? Is it that the display goes off after windows booting process starts?