90IndexAppendixErrors and WarningsTroubleshootingSettingsPlaybackShootingSetup and BasicsLearning About the CameraAccessoriesWireless FeaturesWireless Features/AccessoriesTroubleshoot camera issues as described in this section. If the issuepersists, contact a Customer Support Help Desk.TroubleshootingPowerNothing happens when the ON/OFF button is pressed.● Confirm that the battery pack is charged.● Confirm that the battery pack is inserted facing the correct way.● Confirm that the memory card cover and battery cover are fully closed.● Dirty battery terminals reduce battery performance. Try cleaning the terminalswith a cotton swab and reinserting the battery pack a few times.The battery pack runs out of power quickly.● Battery performance decreases at low temperatures. Try warming the batterypack a little by putting it in your pocket, for example, ensuring that the terminalsdo not touch any metal objects.● Dirty battery terminals reduce battery performance. Try cleaning the terminalswith a cotton swab and reinserting the battery pack a few times.● If these measures do not help and the battery pack still runs out of power soonafter charging, it has reached the end of its life. Purchase a new battery pack.The battery pack is swollen.● Battery swelling is normal and does not pose any safety concerns. However, ifbattery swelling prevents the battery pack from fitting in the camera, contact aCustomer Support Help Desk.The camera makes a noise when turned on or off with an EF-M lensattached.● To protect internal components when you turn off the camera, the aperturenarrows and prevents light from entering the camera.