Uggghhhh WTF!

Fuck. I am frustrated beyond frustrated. I am just pissed rightoff. I leave for school yesterday after being on the comp. all day. Everything is fine. I return home late last night, straight to bed. Wake up and notice my boyfriend had hooked up his old comp. to my monitor. (my beautiful flat screen monitor that I love!) ....I notice the color looks off, I ask him if he noticed anything; course not. I hook my comp. back up and the screen is fucked. I have tried everything. The manual button, the auto adjust button, notta. I did notice there is no red and the background which should be white is a pale aqua. I hate when shit like this goes wrong. I'm thinking WTF dude? What'd you do??? You know when your angry and it just helps to lay some blame? I just wish I had been the last to use it, it might seem more settling that way. Now it will piss me off all day until he get's home to fuck with it somemore. In the mean time I have to use his comp.