[Q] Phone Wont Turn On After TWRP Install topic

Just got my D800 in and was wanting to put a custom ROM on it. So I started off by rooting it with Stump Root.

I then wanted to put a custom recovery and rom manger didnt work and so I tried TWRP Manager. I selected the wrong phone, the LG G2X and it rebooted and will not come on now.

My questions are how do I fix this and get a custom rom on it?

Thanks