Greddy electronic boost and A/F gauge malfunction, HELP!

[INeedNewTires]

Okay so i was at a drift event having a great time, tearin' it up and then about half way through my runs my boost and A/F gauges went out. So i've since checked all the connections (electrical & mechanical) and cant figure out what the problem is. (everything looks connected and fine) I'm running the Greddy electric gauges. i've even checked the manual and it just tells me whats wrong if the lights are flashing slow or fast. The problem is i have NOTHING. No lights, no startup, no warning light, nothing. But i do have power to the face lights when i turn on the headlights. I'm pretty sure thats a seperate deal but i'm not sure as i did not install them (had them professionally installed). So any help as to what may be wrong, or how to diagnose the problem. obviously i really need these gauges and especially now that its cold would like them to work! thanks in advance.