mymarkV

Hi there, I have just purchased a Mark V, after installing some infusions, I had some slowness thus I have decided to reflash my Mark V. I have followed the procedure "unblock a bricked MKV", I got back the MKV but ... I am unable to read the SD card anymore no possibilities to mount /dev/sda or whatever. I have reformatted the SD with ext3, nothing come up ... Otherwise I am unable to enable the wlan2 interface ... spent some hours to do .... is my MKV facing an hardware issue ? Thanks to all.