R329q V8.1 -

If your device is unresponsive and not detected by a PC via USB, you may need to force it into Maskrom mode Armbian Community Forums Shorting Pins:

R329Q V8.1 is a specific motherboard revision found in many budget "MXQ Pro 4K" and similar Android TV boxes, typically powered by the Rockchip RK3229 R329q V8.1

near a contact point on the board; closing this contact to GND can trigger Maskrom mode. Reset Button: Many models have a hidden reset button inside the AV (RCA) port If your device is unresponsive and not detected