[Elecraft] K1 power output

[DAVID MOORMAN]

I have a K1 that I’m looking to sell, and took a look at the power output before listing it.  Power output is as follows:

40 meters 5.2 watts
30 meters 4.5 watts
20 meters	1.3 watts
17 meters 0.7 watts

These are obviously not the expected power output levels.  Power supply voltage = 12.8 volts.  Output set to 7 in the menu.  

What type of fault would this indicate?

Thanks,

Dave  K9SW