Update bootloader on TF701t

Afternoon all!

Have been pulling my hair out for almost a week now trying to get this TF701 updated. I'm stuck trying to get the bootloader updated at this point. Curently version 10.6.1.14.10 I have been able to get the device unlocked and curently have twrp 2.8.7.2 installed. Before installing twrp I tried just about every rom update on asus website and the system wouldn't pick the file up as an update. Now that I have twrp installed I get an error "error executing updater binary in zip....." I am guessing that is because the bootloader is on an old version.

Can someone please give me a little guidance to get this updated.... any help is greatly appreciated.
Thank you.

Tf701T Headphone jack noise

cpu noise/static headphones
I'm having an issue with my tf701t when I use headphones in a quiet room. I can hear a constant buzzing. No audio playing and it changes frequency with the cpu load (launching apps, touching the screen) . I've tried different headphones/speakers all produce this awful noise.

I've rma'd this tablet four times now and the noise is still there... They have replaced the headphone jack, motherboard,ribbon cable and just replaced the entire tablet. They said they could not reproduce the audio issue I am having and sent me a video showing that in fact they couldn't reproduce the issue......:eek:

Maybe someone knows how I could make it work properly like they have, possibly different cable?
Here is my video showing the noise I hear: sorry can't post links

dropbox dot com/s/qi5zxq2k4rfjm2m/20150507_222141 dot mp4?dl=0

Here is there video showing no noise: sorry can't post links
asuswebstorage dot com/navigate/s/80350C53A8D14AC7A9EE74B6FF18DEBFY[/url]