when I turn camera on there is no lcd screen

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," 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 Kodak's website and look for firmware updates. Download and install them.

Have you tried to recreate the issue with the AC adapter or another set of batteries? There's a chance that you're not using the correct battery. Kodak is very anal about using recommended batteries for their cameras. Underpowered or non recommended batteries can not only cause problems like this, but Kodak warns it can also do damage to the camera. Which, I believe is a tad dramatic. But I can see it causing performance issues like this.