Where is the battery on the life fitness 95xi

see if this link helps you out.
life fitness 95xi elliptical screen not powering up Google Search

Check the speed sensor to turn on the elliptical, or send the lower board to repair with www.xtremefitnessservice.com, ask for Javier

check the battery usually located in the front bottom under the shroud

I would suggest verifying 6 volts output from the battery. From there, check the reed switch connection on the power control board. Also verify the gap between the reed switch and the magnet on the pulley. It needs to be close enough to the magnet to get a good reading. I am attaching a link to a video that shows the reed switch replacement procedure. You can see the magnet and also the slots in the reed switch that allow the adjustment. LifeFitness 95Xi Crosstrainer Video Reed Switch Replacement Speed Sensor

check the battery or alternator that charges it. battery is usually front end and alt is in the back. if this is not it it could be the the controller board

I hope this helps

Battery is obvious first check. Using a multimeter on 20V DC setting, touch both + and - terminals and not should be very close to 6V. In my case, my battery was 2V but after replacing it, still wouldn't power on. I did notice by main wiring harness from control board to the display was warm, so I repacked the control board and voila! I probably static shocked the control board when i was moving it. See here: https://www.fixya.com/support/t25141832-lifefitness_95xi_wont_turn

under main shroud 4 screws 2 each side, then allen key to remove and replace.

Start with checking the voltage out put of your battery. Video about How to Test Battery

u open top rear hood and you will see battery on there