On-Off weakness on my fx-100 too. I blobbed some solder across the switch so it's now permanently on (no problem, as it's auto power-off still works a treat) and I've had to gaffer tape the back as I've long since lost the battery cover. Been with me through GSE / A / Uni + jobs. Even with all this it's still on the original batteries!!
Brought an fx-83GT Plus as I now teach maths, but I much prefer the fx-100. Where is my favourite X <--> Y button on these new improved versions?!
Biting the hand that feeds IT
