Do not throw away a boot-looping MXQ. In 90% of cases, a fresh flash of Android 6.0 or LibreELEC will bring it back to life as a functional media player for YouTube, Netflix (SD only), and local video files.
Search tags: MXQ EP68 firmware, RK3128 brick fix, Rockchip Batch Tool guide, RTL8723BS ROM, SV6256P Android 6.0, MXQ Pro 4K reset. Firmware Rk3128 Mxq Ep 68
The community will help you locate the exact ROM. Do not throw away a boot-looping MXQ