Just finished my mbx6r kit installed two hitec 7954s and im running them with
A sr3100 receiver everything was good until I set the fail safe and both servos bound up steering went hard left and throttle went in to the fail safe mode I set which was full brake. Hooked the batt up in my ofna buggy and it was fully charged. Went to hobbytown they couldn't figure it out. Tried a capacitor didn't do anything this is my first kit and I'm just frustrated. I know I'm pretty much screwed and have to send the servos and receiver out. Should I go with other servos or is it just the receiver? Advice would be appreciated.

Try backing off the full brake on the failsafe setting. That could be stalling the servo and drawing the voltage down. Especially if you have a very aggressive brake endpoint setting (which is hard on the servo anyway). What receiver battery are you using?

I'm running a spektrum sr3100 it doesn't even light up when I plug everything in. I have a protek 6 volt 1600 mill flat pack and I can't adjust the EPA now I get no response from my transmitter to receiver I'm pretty sure it's shot. I also tried resetting the transmitter and it still did nothing I tried using the spektrum receiver that came with my transmitter and it has the same problems.

No light on the receiver? Try unhooking the servos, make sure the receiver pack is connected correctly, black-negative to the outside. Try binding with a different fresh transmitter model.

Mentioned resetting the transmitter? Reset the parameters? If memory serves if you do that you need to go through the full calibration procedure, or weird things happen.

I just order a new receiver and I'm sending the old one to horizon for them to look at.
Should I keep these servos or should I get something else?