Help! my camera just started bugging out

I own a Olympus E-620. Now I don't know A whole lot about cameras, past the small photography class from HI school , and I've had this one for a few years as a gift being my first camera and I've never had a problem with it for the 5+ year I've had it. Now the problem I'm having is when I turn it on and get ready to take a picture the camera won't do anything but auto focus. But the weirder thing is when I go in live view the screen is all green and fuzzy but the hud with all the settings is there. Than after a few seconds in live view the camera resets over and over and occasionally I'm able get into the menu. And when I do sometimes the screen is zoomed in where almost nothing fits in screen. It's never done this and it hasn't been damaged much more than being dropped once from what I know of and that's when my uncle had it first. I don't have the money atm to get a new camera and If someone could help figure this out it would be much appreciated. here's what the screen looks like