If you try to use recovery mode in two computer most probably you have a unusable device you can try to contact Sandisk hotline if your device is still under warranty, you can also give it a shot to do a firmware update using WIFI if your device still turns on.
Check out recent threads regarding the recovery tool. There appears to be some new issue accessing the firmware on zing.net that’s causing the recovery tool to abort.
Also, the Connect will not receive the firmware version over WiFi that re-enables the WiFi functions (Internet Radio and Flickr photo). This needs to be done via the recovery tool, as other recent threads have also discussed.