The standard utility for flashing .img files.
The "LP3 V2.3" designation is critical; it dictates which Wi-Fi and RAM drivers are included. r29 mxq lp3 v23 firmware link
To install the firmware, you cannot simply "copy and paste" it. You need specific software to communicate with the Rockchip processor. The standard utility for flashing
The MXQ series is produced by various manufacturers using different chipsets. To ensure compatibility, you must verify your board details before flashing. Usually based on the Rockchip RK3228A or RK3229. r29 mxq lp3 v23 firmware link
This usually means the firmware version is incompatible with your specific NAND flash chip.
A massive archive of Rockchip firmware.