Your NHG47K suggests a stock AOSP build, not manufacturer-customized.
button and wait for the process to reach 100%. The box will reboot automatically when finished. Alternative OS Options android rk322x box rk322x box 7.1 2 nhg47k firmware download
If the box boots but stays on the logo indefinitely, boot back into the flashing tool and perform a full "Erase Flash" or "Restore" operation instead of a simple "Upgrade." Your NHG47K suggests a stock AOSP build, not