No, you most likely do not need to buy a new camera, but you will need a new battery. Before you put in the new battery, wipe the interior of the battery compartment clean using a rag dampened in vinegar. Be sure not to get the rag too wet. Wring the rag out before using it to clean the compartment. Leave the compartment open to dry before inserting the battery. Also feel free to consult the Troubleshooting Guide for the device for further help.

Though it is ideal for all of the screws to be present, the camera will still remain together if you have at least the following screws: (1) Two replaced diagonally from each other on the back of the screen (2) One placed underneath the screen facing upwards Also feel free to consult the Troubleshooting Guide for the device for further help.

Yes! A hidden screw is located under the plastic flap labeled DC-in. This screw connects the motherboard bracket to the rest of the camera enclosure. Once you remove that and have removed all of the other screws, the motherboard will come free. You can also reference the guide on motherboard replacement for all of the screw locations. Also feel free to consult the Troubleshooting Guide for the device for further help.