Hard bricked Nexus 7 Screen not working,

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http://forum.xda-developers.com – Device : Nexus 7 Running : Android 4.1.2 Rooted Problem : I was trying to unroot it and flash a 4.2.2 ROM to the device and i ended up bricking it somehow. I looked around a lot on here and youtube. I found one solution i had not tried which was to get into recovery mod. But the device was stuck on the boot loaded. So i hard shut it down, and pressed the key combination to load the boot loader. And, the screen wasn't loading. I heard the little chimes my computer makes when ever a USB device is active, so i heard the thing load into the boot loader. But its not showing on the screen! Please (HowTos)