You must use a ROM compatible with the H3Q44-V3.0 board. Incompatible firmware can permanently disable the WiFi chip (common for SV6256P or XR819 modules) or the remote control. Installation Software
Use a toothpick or paperclip to press and hold the Reset button while plugging the USB cable into the (the rear port) and your PC. The Flashing Process : firmware tv box mxq pro 4k 5g placa h3q44-v3.0