I want to use the Polaroid FLM-1507 monitor my daughter used in school but I only get white and black lines when I plug it to the computer. The controller has been lost and can't figure out the buttons on the top to get it into VGA connection mnode, now on TV.

Do you mean the remote for this TV is lost? I hope this manual helps.

https://www.manualslib.com/manual/131663/Polaroid-Flm-1507.html#manual

Note: Source can be programmed manually.