dear all
i have three 433 with power issue .12v only working but i try with 24v only power led on then not boot pls anyone help
sorry for my english 
look for swollen caps on the board and replace them
look for swollen caps on the board and replace them
I’ve had this happen to multiple 411 boards. Hopefully these are not still in production because running on 12v is a Band-Aid. They will eventually fail completely.
My 411’s had multiple bulged caps and 2 were leaking.