[Elecraft] Strange problem last night in my K3

[Ramiro Aceves]

Hi all,

I do not know if this is a problem in my K3 or I made some mistake with 
K3 buttons because of I was falling asleep.
Last night I was ready to do some broadcast AM listening and entered 
5040 kHz on the keyboard. Frequency did not change. Tried three times 
and it did not work. I moved VFO A and VFO B and frequency did no 
change. I pressed up and down buttons in the microphone and frecuency 
changed. After that, VFO A and B worked again. Was this a K3 failure or 
it was my mistake? What dou you think?

Thanks in advance

Ramiro

EA4NZ, ex EA1ABX