Sat on it cracked the lcd monitor - how can it be

Well, you'll need to replace the LCD screen. It's relatively easy on this camera. You will need to get a replacement screen of course. I suggest checking ebay for "donor cameras" (e.g ones with broken lens or other issues not involving the lcd screen).
Of course if you are not comfortable sorting this out yourself and none of your friends lilkes to tinker with electronics, you might be better off selling the camera on ebay as spares and getting a new one.

Good luck!
Raf