As long as the memory card is compatible with the Nikon Coolpix P530 you may use it. In the camera's settings you can format any SD card to ensure compatibility with the device. Before formatting, make sure any images or video you want to keep are saved on a computer. The process of re-formating the memory card will delete all pictures previously saved on it. For more information on your issue or any other issues with the camera visit the Nikon Coolpix P530 Troubleshooting page its link can be found below . Nikon Coolpix P530 Troubleshooting

If your camera will not turn on, ensure that the battery is charged. It is a possibility that your camera may be unresponsive even while plugged into the AC adaptor. Your camera will not turn on until sufficient charge has been obtained. If the battery is charged, the camera could be overheated. If this is the case allow the camera to cool down in a place away from direct sunlight or sources of heat. For more helpful information about this problem or any other issues check out the Nikon Coolpix P530 Troubleshooting page here on iFixit. Nikon Coolpix P530 Troubleshooting

If the flash is not working on your camera, the first thing to do is to make sure the flash is enabled. This can be easily done by finding the correct setting in the camera’s menu. If you are having trouble finding this menu, or are still having trouble with the flash be sure to check out the Nikon Coolpix P530 Troubleshooting page on iFixit.com. It will have more helpful information to help you get your flash working properly. Nikon Coolpix P530 Troubleshooting