2 options, you can root it yourself and install a app that will push it into a lower power state or another gentleman on this board has made a ROM image
Possibly due to the format on those cards, make sure they are formatted FAT32
Try checking out this thread…. Try my touchscreen fix also change out the screen protector
I too have this problem, couldn’t tell you why
Now what I recommend is you pack this thing up and get you money back…. ASAP
2) Windows doesn’t like to format large cards for fat32, but they can sill read & write it, I would recommend moving the data off temporarily. Then format them in Android and move the data back on.