[beagleboard] Please look these pictures!

So, what is your question?

Gerald

Kai,

You might look at item 5 under http://circuitco.com/support/index.php?title=BeagleBoneBlack#Revision_A5A_.28Production_Version.29:
5) Added a 100K pull down resistor from J1 pin 1 to J1 pin 4 to fix the unterminated serial port issue.