Transformer TF300TL root?

Im have a transformer TF300TL and ill root the device but im try with a lot of methods and my tablet not accept any of these.

My tablet characteristics

Qualcom 2.4ghz 4cores
Nvidia tegra 3
1Gb Ram

I need help to solve my problem.
Sorry for my english , because I'm a begginer.

Asus Transformer TF103C Bricked!

Hi Guys!
My wife have an Asus TF103c tablet. I try update the Kernel from the official site, quick reboot, and nothing, only Asus logo, not continued. I found here(, anywhere XDA) an one-click-unbrick thing, look like this is work. But ever since 2 option in boot: 1. Fastboot mode: I no found usuable application, 2. a screen, like BIOS, but i no have keyboard, just the volume buttons moving up-down. Could someone help me?

Attached Thumbnails

 

Asus Transformer TF103C Bricked!

Hi Guys!
I try update the Kernel from the official site, quick reboot, and nothing, only Asus logo, not continued. I found here(, anywhere XDA) an one-click-unbrick thing, look like this is work. But ever since 2 option in boot: 1. Fastboot mode: I no found usuable application, 2. a screen, like BIOS, but i no have keyboard, just the volume buttons moving up-down. Could someone help me?

Attached Thumbnails