While prepping the HAM1 ISI for testing last night, I noticed that one of the HAM2 HEPI L4Cs seemed non-responsive. It seems this has been the case for quite some time, 206 days according to the attached ndscope. Something happened on Oct 1st last year that cause this L4C to suddenly have only ~1/50th the signal the H2 L4C on the HEPI  to sees. I have poked at it a bit, checked cabling on the pier and gently hit the foot to see if I could revive the sensor. I have a couple other tests I want to do before deciding to remove the actuator to replace the sensor, not exactly eager to have to do that.