This is the newest firmware for original MK808B, it is not for MK808, not for clone mk808B, please be aware.
The firmware fix the problem for no blue led light when you connect with the charger, or it has no signal on your TV.
See we are not selling product, we also care our customers, we are trying our best to push factory to release new update. so ordering from geekbuying, you will get fully tech support
Firmware download link is
We put the instructions in the download file. after you upgrade successfully, here is the screenshot:
any questions,feel free to report.