Can't Read SD Card Anymore / Can't Turn It On?!

       I am sorry to read about your SD card problems.

From all your descriptions it appears to me your SD card is the problem not your Clip Sport. Is your Clip Sport working well with FirmWare 1.29 when your SD card is not inserted in the player??

If this is true, then I suggest you buy a new micro SD card with 16 gb size and Class 4. (Not all Class 10 will work with SanDisk players.)  The player does not really need to use a more expensive 32 gb card with the 2000 file limit in FW 1.29.

       Insert the new card while the player is turned off.  Then turn it on and hopefully you will be back to normal.