LG Optimus L5 e610 randomly reboots

I have got the phone of my sister in law. It is a LG Optimus L5 e610. While trying to flash CM it has been bricked. It is constantly rebooting after media scanning. It reboots even in the bootloader (CWM 6.2.8). The bootlaoder shows that the sdcard can't be mounted. The time the phone stays in android is to short to use adb. The phone has been rooted using this guide . This guide has been used to flash CWM. Well hence I can neither use adb to replace anything in the filesystem nor use the recovery to install a zip. Is there any way to get this phone back working?