I've had custom roms on my tf700t before but tonight made a mistake when trying something new.
Using fastboot, I used the command 'fastboot erase system -w', thinking that after that I could flash another custom image. That didn't work and what I have now is a device that won't boot.
When booting it shows
'Android cardhu-user bootloader (1.00 e) released by "WW_epad-10.6.1.14.8-20130514" A03'
I can still get into APX mode and I can boot in the Recovery mode which is CWM v220.127.116.11.
I used abd push to send the latest stock rom from the asus website to the device. I saved it in /emmc/ and was then able to select the file from CWM. When I choose to install the file, it installs correctly.
However, after reboot the device just gets stuck with the asus logo. It doesn't boot.
The one million dollar question is of course: can my device be saved, without sending it for repair?