Chosen Solution
My iPhone 5S (just the board, charging port, battery, screen and home button) boots into recovery even after successfully restoring i iTunes. I’ve tried the reboot out of recovery software programs and nothing works. The battery isn’t defective, It’ll only hold a charge for about 2 hours mixed use.
The signal for a board to boot into recovery mode is home button held down with usb cable plugged in. Take away those variables and see if the board will boot (i.e. disconnect home button and boot with power button not usb)
Try to restore with 3uTools and post results.