The FMU no longer works And no LED lights up and the pixhawk heats

Please tell me about burn pixhawk.My are also dead .only center led blink or not ant upper led are working please give me solution

Hi,
I am facing the same problem in Pixhawk 6X. FMU power LED stopped blinking in the functioning state. Although as for adding sensors which may have damaged the FMU as mentioned by someone that it is a possible reason of the problem, I did connect h-RTK on GPS 1 port.

Please share the solution if anyone has got any.