Ramps 1.4 Heatbed Mosfet (5 replies)

Guys i have a problem that i can't understand, i messure the heatbed mosfet and get 11.88V all the time. Never close but this is other problem for later, my real problem is that when i connect heatbed i get 0 power.

If i messure negative from power supply to any of heatbed connections i have 11.97V.

I replace heatbed and still the same. I check fuses and power flow ok.

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Thanks Panos