I have repaired a few ipad minis and never had problems. This one though, is killing me.

I removed old digitizer, took out old lcd, unplugged battery, but new digitizer back in, put lcd back in, plugged battery back in and went to power up to test.

Apple logo, awesome! but then after several seconds on the logo, it fades out pretty quick and reboots the ipad and does it all over again.

Ive tried other digitizers, i've double checked everything I could, tried restore (error 9), etc. Made sure no debris anywhere inside causing a short.

Any ideas?