If you have a source selector for HDMI it should be as simple as just putting the PS3 on the input, and then connect both the monitor and TV each to an output port, then switch to the proper output port depending on which one you want to use at the time.
Is it possible to have my PS3 hooked up to my monitor AND tv at the same time while also having my pc connected to the monitor? Reason being, when my gf is watching tv, I'll just bring the ps3 over to my monitor and play. When she's gone, I bring it back to the tv but I'm getting sick of moving the ps3 and unhooking the wires all the time. The tv and desk area are about 15ft away from one another. I currently have my ps3 and computer connected to the same monitor via a 3 port HDMI switcher. The monitor I'm using is a AOC e2343Fk and the tv is an LG 42LK450. The PS3 I have is the newest 500gb slim.
Thank you for reading and any help you can give is very much appreciated.