if three dots / led are blinking on receiver humax 5400 & it does not boot proper and continuously blinking three dots, I have experienced an experiment and succeded.
This problem is due to currept channel list.
so,
Download default channel list and install it in your humax 5400 receiver.
or download a channel list from any of humax 5400 and sent it to your receiver.
This problem comes due to sparking of power plug while receiver in boot.
remind me in pray.
thank.