[Elecraft] W2 problems

[Steve Bunting]

Hi gang,

I have a w2 wattmeter that worked well when it was first built and has 
been in storage for the last few months. Now, when I apply DC the start 
up calibration routine runs just fine and the meter is ready to go. 
However, when I apply RF several LEDs light as expected but within a 
second or so the meter turns itself off. I have tested with a dummy load 
rather than an antenna and different frequencies and at RF power levels 
all with the same result. Once the meter is off I can restart it by 
simply pressing the power button again.

Any idea what has gone wrong and how I can fix this issue?
73
Steve
M0BPQ