heat bed

[Gotrek]

I received and built a prusa i3 x about 3 weeks ago. From day one the heat bed would not work though the thermister does. I have double and triple checked the plugs to make sure they were in their proper locations and they were in tight. After looking at a few posts here and looking at the board I see that the led light under the power socket is not lit when the bed is programed to heat up

[Mark]

so you can check the heatbed mosfet that controls the heating, see if it is dead or not, check out this link:
http://www.geeetech.com/forum/viewtopic ... 19&t=17039

[Gotrek]

with the power on and the heat bed programed to heat up the voltage across pins 2 and of the mosfet is 0.0

[Mark]

yes when heated up the heatbed the voltage between pin 2 and pin3 is 0V, that correct. So when not heated up, did you get 12V? If not I think you need to check the PSU output for the bed, is it 12V?