I tried to flash the latest firmware after not using the cam for about 8 months.
Now when I go to plug the camera in and set it up for the first time in 8 months… it shuts off after about 5 seconds. It powers on with a Yellow light, then turns off within seconds. No chance of setup or anything.
Your SD card technically should not be necessary for the cam to start up. If you are having troubles I would suggest that you try this to format your card in a PC using a deep or full format. SD Card Association Memory Card Formatter , then Flash New Firmware. That should put you back in action unless you have developed some kind of hardware issue.
If that doesn’t work, try a Factory Reset followed by the above process to get the latest firmware back.
Post back and let us know if that helps.