The SD card flashing method overwrites everything, including the bootloader. You can jump from 5.1 to 7.1.2 directly.
| Error | Cause | Fix | | :--- | :--- | :--- | | | Reset button not held long enough | Use a thinner paperclip. Hold for exactly 7 seconds after power-on. | | Wi-Fi doesn’t work | Wrong firmware for your Wi-Fi chip | Re-flash with the correct RTL/SV6051P version. | | “Burn card failed” error | SD card too large ( >32GB ) | Use a 4GB or 8GB SD card (Class 10). | | Screen is pink/green | Wrong bootloader/resolution | Boot into recovery (reset + power) and select “Factory reset”. | | Remote control doesn’t work | Remote.conf file mismatch | Copy remote.conf from original firmware or use a USB mouse. | mxq pro 4k firmware 71 2 download sd card top