Yesterday my phone started displaying "Internal Error" messages whenever I try to do certain things such as adding a widget to the desktop and the call log & conversations stopped working. Tried everything to no avail and finally diagnosed the problem as a corrupted emmc drive.

I decided to do a hard reset following the instructions here to fix the emmc drive but I get stuck when flashing the emmc. It just says "Suitable USB device not found, waiting.". I have waited for upto an hour but it doesn't progress any further. Trying all combinations of suggestions on this thread of booting the device and holding down "u" while plugging in cable after the firmware flash but still no luck.

Can anyone please suggest anything else? Is there a way to re-format the emmc device without actually re-flashing it?