Welcome to Android Central! When you say you tried Recovery, did you successfully get to the Recovery Menu, or did it not seem to work? Make sure you followed the steps shown here exactly:
https://www.youtube.com/watch?v=Gy19q8IOPhU
There's no sound, but the steps look to be:
1. From a powered off state, press and hold Power and Vol Up. You may have to hold these down for about 10 seconds.
2. Once the screen turns on and you see the logo, release Power but keep Vol Up pressed. Wait another 5-10 seconds.
3. When you see the Recovery Menu, use the Volume buttons to scroll to Wipe Cache Partition, then press Power to select.
4. After the cache wipe is done, highlight Reboot System Now and press Power.
If that doesn't work, try the Wipe Data/Factory Reset option from Recovery.