biig problem, need to take broken lcd to sprint but phone is rooted

[nasa1303]

ok. so i had an accident at work today. i was walking around someones attic and i fell through the ceiling. obviously the first think i noticed was my beloved htc evo laying on the cement. so i picked it up to call my manager to report what just happened and the lcd is busted to peices. now i have insurance and i know it would be a free fix but i am worried because it is rooted and i have superuser icons, rooted app icons, s-off, all this the tech can see once he repairs the screen. what can i do to avoid being booted out or charged a fee when or if they see i have rooted it? is there a way to unroot without the lcd. i went and bought a hdmi cable hoping i could throw my image on the screen and nothing. what to do? please help me. i have looked around and all i see is unroot guides with steps that i have to be able to see what's on my screen.