Hi Stirling, no pics came through. however, how do you know that the Short function is not working. Have you or the other Tech actually tried to test a known faulty/shorted tube. That is the only way you will know if it really is a problem ot not??? Maybe just maybe there is/was no shorts to find in the tubes you were testing??? I’m just looking for simple solutions. Ya gotta look at everything.
At first, the system of checking for shorts on this tester can be a little hard to understand and a little tricky, to say the least, for anyone who is not use to using this particular tester. See the section, under Shorts, Pages 8 and 10 in the Manual. Took me a while to figure out all they were saying.