Problem with reading temperatures (4 replies)

Hi,

I have Ramps v1.2. A while ago everything just worked fine. But recently my electronics won't read out my temperatures correctly.
Earlier my NTC 100K sensors were provided with 4.5V I guess, but now they only get 2V. I think thats the reason of wrong measurements. (125 degrees at room temp.)

How can I get it back to 4.5V, so the temperatures can be read properly? How did this happen?

I uses sprinter as firmware


Thanks!