yep, had that problem with mine when it was a month old.
Did a full sunday racing with no problems, then switched on tuesday to configure braking for wednesday racing and it was completely dead, no lights no power and would not be recognised by pc software.
sent it back to horizon hobby, as original supplier had no stock and was told by tech support that controller had died.
replacement was sent with the latest 2.9 firmware on and so far(touch wood) has been working fine.
there are numerous problems with these units, if you get a good one then they seem ok otherwise there are loads of horror stories about them.
The losi motors are really good but would use a different ESC next time.
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