MDM Trouble Report for 2017 Dec 21

Telescope: 2.4m
Observer(s): Fesen, Weil (Galayda) (MDM Observatory)
Instrument: OSMOS/B

Problem(s) Encountered:
Got a call around 1830 local time that the top-right quadrant of the B4K was not 
reading out correctly.  I'm not sure from the conversation if it was simply bias-level or
not, but there were no stars.  I had the observers focus on the cable connecting the
detector to the HE, primarily at the connector on the HE-end.  Attempt was made to 
gently push/wiggle the plastic connector upwards in an attempt to reseat.  A test 
image showed no improvement but on a hunch, I had them try it once more, which 
corrected the issue.  Double-checking this cable this morning, I notice that the threaded
collar that is supposed to hold the cable to the HE spins freely in the CW direction,
so I fear that this connection may continue to be temperamental.  A new cable may be
in order...

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Submitted on 2017 Dec 22 [8:27:57]