According to the camera's user manual, the batteries should be replaced with the camera switched on, which appears anti-intuitive because with most cameras exactly the opposite is recommended.
Quoting from the troubleshooting section of the manual:
Replace the batteries. only when the power is turned on. If you replace the batteries while the power is turned off (when the lens is retracted), the lamps on the brightness dial blink after turning on the power even with new batteries
Try the following: with the camera switched on, remove the batteries, then reinsert them. If the problem persists, the camera might indeed be defective and it is recommended to turn the camera off and remove the batteries immediately, then have it checked by a repairperson.
Note that you must use prime quality batteries in this camera. Fresh alkaline batteries from a reputable manufacturer are recommended. Be wary of cheap batteries bearing prestigious brand names, these may be counterfeits and will not perform well.