The phrase "a monitor on which" is correct and usable in written English.
It can be used when describing a monitor as the surface or device where something is displayed or viewed.
Example: "I have a monitor on which I can see all my applications running simultaneously."
Alternatives: "a screen where" or "a display on which".
One afternoon last winter, in the offices of the U.I.D.A.I.'s technology center, on Bangalore's southern ring road, a young computer operator was watching a monitor on which photographs of Indians were passing before him at the rate of one every two or three seconds.
Marsh entered the room and began studying a monitor on which the last brain scan was displayed.
Kaling sat at the head of the table, typing on a keyboard; elevated above the table was a monitor, on which everyone could view the burgeoning script.
I get a sense of what this involves when I watch him shoot a scene in the garden; he runs on, delivers a line, then dashes off again, finding a monitor on which to watch the rest of it, headphones on, script in hand.
Cables attached to the rod snake across the floor, first to a section of chain-link fence, then to a video monitor on which a film is playing.
Her artistry is evidenced by winsome sketches on a wooden frame that holds a video monitor on which plays a dialogue between father and daughter.
A Buddha head, half buried in dirt, is in front of a television monitor on which a similar Buddha head appears.
In the test, participants view a computer monitor on which a random series of single digits are presented at the regular rate of 1 per 1.15 seconds.
Monkeys sat in a custom made primate chair at a distance of 57 cm from a computer monitor on which visual stimuli were presented.
She received an additional citation for driving with a "visible monitor" on, which usually applies to TV screens and violates California state law.
Nestled in its folds is a small monitor on which you can watch two bulldozers in a junkyard downsizing the vehicle — a performance in itself.
