7200B QTOF does not turn on TOF Vac


We recently vented our system in order to change the column. However, now the system does not turn on the TOF vac. Rough pump and quad. are at normal levels, all turbopumps at 100% speed. But TOF just says "Off". We've tried to powercycle the instrument and rebooted the computer to no help.


Any ideas?



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