i finally found the problem with my 280c that wouldn't run off of
batteries. in the course of taking it apart a number of times the
previous owner had failed to replace the screws on the battery
contact. one of those screws provides grounding to the battery
terminal, and the service manual points out that if it is not
reinstalled problems may ensue. i popped the case screws in there
and sure enough it works fine. remember the curse of the missing
battery contact screw!! bob
boredom is the threshold to great deeds -- w. benjamin
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