Lumix cameras are marketed by the electronics company Panasonic. They are available is a wide range of models from the most the simple point and shoot to more advanced models that included lenses manufactured in conjunction with the German camera and lens company, Lecia. Trying to fix a Panasonic Lumix camera that has stopped working can be done at home. However should you open the camera you should consider doing so will likely void any warranties that may be in place with the camera.
Remove the batteries. Digital cameras are as much mini computers as they are cameras. They need a constant source of power to function properly.
Clean the contacts in the battery compartment. Using a small eraser on the end of pencil, carefully rub the eraser across the contacts to remove any dirt that may be on the contacts preventing a good connection between the camera and the battery.
Recharge the batteries. If you are using rechargeable batteries, charge them to full capacity and then using a battery tester see if they are holding the charge. Before you put them back into the camera, clean both ends of the batteries with the eraser in the same fashion you cleaned the contacts in the battery compartment.
Remove and replace the card. If the card is full, the camera may not function since it cannot save the pictures. Delete some pictures or use a new card. Make sure the card slides into its proper position and the door is closed properly.
If you decide to open up your camera to try and fix, be sure to remove the batteries before doing so to reduce the possibility of an electrical shock.