says access across screen

when i turn my camera on it says access across the screen. it is on but i cannot take pics or look at pics that i already took. i just used it last night and now this morning it will not work...any advice?!

First thing I would do is reset the camera. This is a fairly easy procedure which involves either going into your setup menu and choosing "reset" (or intialize), holding down the menu key for 5 seconds, or, removing the batteries for a few minutes. It may be that the firmware loading got corrupted and the camera just needs to be "rebooted," which is something that turning it on/off won't accomplish. But after which, you should have the camera reset to factory default settings.

Another tip is to go to Sony's website and look for firmware updates. Download and install them.

Also, make sure you have fresh high capacity (mAh) batteries in it. Often undercharged or depleted batteries can easily affect camera performance.

After I posted this, I took out my memory stick and turned on the camera and it worked, so it must be the memory stick...any advice on this? The camera works fine without the memory stick or with another memory stick but when I use my current one (with all my pics on it!) it still says access across the screen and i cannot do anything with the camera.

My recommendation is to get a USB memory card reader for the Memory Stick and see if you can copy those pictures onto your PC. Then, I'd reformat it. Sometimes a file allocation tables get damaged or corrupted. You could also see if there's a file recovery utility (I like F-Recovery) for the Memory Stick and see if it can fix it.