Sony ILCE-7RM3 Instruction Manual

To update the firmware, download the latest firmware update from the Sony support website, connect your camera to your computer via USB, and follow the on-screen instructions provided in the update file.
Ensure the battery is fully charged and properly inserted. If the camera still doesn't turn on, try a different battery or check the battery contacts for dirt or damage.
Use the camera's built-in sensor cleaning function first. If further cleaning is needed, use a blower to remove dust or consult a professional for sensor cleaning. Avoid touching the sensor with your fingers.
For low light conditions, use a high ISO setting, a wide aperture (low f-number), and a slow shutter speed. Consider using a tripod to avoid camera shake.
To reset the camera to factory settings, go to the menu, select 'Setup', then 'Setting Reset', and choose 'Initialize'. Follow the prompts to complete the reset.
Ensure that the lens is correctly attached, clean the lens contacts, and check the autofocus settings. If the problem persists, try resetting the camera or updating the firmware.
Reduce the screen brightness, turn off image stabilization when not needed, and disable unnecessary features like Wi-Fi and Bluetooth to conserve battery power.
Use a UHS-I or UHS-II SDXC card with a minimum of V30 speed class for optimal performance when recording 4K video.
Download and install the Imaging Edge Mobile app on your smartphone, enable the camera's Wi-Fi, and follow the instructions in the app to establish a connection.
Store the camera in a cool, dry place with the lens cap on. Remove the battery and memory card if storing for an extended period to prevent damage.