Heatbed wont heat

I got the problem that i cant switch the heatbed in manual and while printing on. There is also no LED on. All other functions are working well.

Know somebody a solution for this problem?

Try unplugging it from the board Heater 2 then see if the LED comes on.
If it does then there maybe a short in your wiring.

Tried it no change and at the mosfet I dont see with my Oszilloscope any change too. nether on th power or the logic side

I hate to say it but it sounds like the board may be defective

Sorry that i didnt response but i had to work. I fixed the problem by resoldering the Atmel and reupload the firmware.

Glad to hear it’s working