Panasonic Lumix DMC LX3 cannot be turned on repair

The Panasonic Lumix DMC LX3 stopped working or wouldn't turn on from a charged battery. Dismantling the back cover and cleaning the battery contact started again. The disassembly did not have to be complete, it was enough to check whether there is a loose contact and click again. Then the Panasonic Lumix DMC LX3 compact camera started working again. Panasonic Lumix DMC LX3 cannot be turned on fix. It doesn't always have to be the only defect, it can be a defective IC chip, or anything else. Repairs may only be performed by an experienced user or a service center.