opened up my pronto to check for loose wires and such.
found 2 of the 3 screws on the back almost impossible to remove without stripping.
pulled off the case and was about to remove the screws that hold the next board on...there are a possible 4...mine had only 2! The bottom 2!
the light switch is toward the top, and upon inspection, it appears that the switch has shifted, I am going to put it all back to gether to see if the switch works now...if so I guess the missing screws was the culprit...what kind of company sells their products with missing (2 of 4) screws.