Download latest Android Lollipop 5.1.1 stock firmware PC version for Beelink M18 TV Box from here, here or here. Download latest Android Lollipop 5.1.1 stock firmware SD card version for Beelink M18 TV Box from here, here or here. Download Amlogic USB Burning Tool v2.0.8 from here or download Amlogic Burn_Card_Maker v2.0.2 from here.
Archive name: MX64_105L1 / 1664584 Beelink M18 Card Rom
Image: MX64_105L1.img / MX64_105L1_sdcard – p200_2G-ota-20160130.zip
Archive file size: 331 MB / 363 MB
Build number: Android/p200_2G/p200_2G:5.1.1/LMY47V/20160130:user/test-keys
Inside archive: firmware + factory_update_param.aml
Platform: AMLogic S905
Caution Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data.