An update....first of all, I should clarify, as the monitor didn't really "fall".  As I moved the cab, it shifted along with the monitor and dropped a bit, as my monitor box rests on the base of the cab.  Not a big fall, but enough to give me a scare for a bit.  
Anyway, I got to testing my monitor using the settings you gave, and the monitor was a bit off.  I set all the settings to what was provided, however, I couldn't get any picture putting my SB setting with a two digit and only could at about a 175.  Now, when it resets, the pic is dim, but as soon as I raise or lower the sb setting by one the pic instantly becomes bright.  Now my problem is as soon as I start mame, the pic feezes and all my controls freeze as well.