Hi Leon,   I got a reply, and I can say, everything is fine. This is, like I guessed, LED for BMC_HEART_BEAT_CP, amber blinking is normal behavior.   Have a nice day!CheersStefan
Hi there Received my T140 an upgrade for the T20.   Just a Flashing Amber led on the Motherrboard ? bugging me. Is this normal?    
T140 flashing amber led on MB