This is likely due to a sensor or connection fault & seems to be common to this model.
Panasonic Lumix DMC-FT30 - FAULTY
Panasonic Lumix DMC-TZ8 + faulty (274125)
Panasonic Lumix DMC-TZ100 - FAULTY, POWERS ON, ZOOM ERROR
Panasonic Lumix DMC-TZ2 FAULTY CCD SENSOR - For Parts or Repairs
PANASONIC LUMIX DMC-TZ100 DIGITAL CAMERA - NO POWER / FAULTY / SPARES / REPAIR
Panasonic Lumix DMC-FS10 Pink Digital Camera & Battery . Please Read *Faulty*