does anyone have a computer screen that does not have a power button?
I have a computer screen at work, a desk top, and it doesn't have a power button, does anyone know how to turn on this type of desk top?
You probably have an Apple iMac. The power button is on the back of the display, behind the left bottom corner of the display. Poor usability design.
Here are some instructions for the iMac, and for most (all?) other recent Apple computers:
How to turn your Mac on or off - Apple Support
If this isn’t an Apple computer, we’ll need to know a little more about it to help find the power button. Most computers have model names or codes, and vendor names embossed or printed on a sticker or label somewhere on the back or (less often) on the bottom. Apple does that too, but in really fine print.