Having issue configuring heated bed w/o thermistor

I checked around, but aside from people having issues getting the thermistor and the bed to work, I'm having issue finding help getting only one to work, w/o the other. I've set #define TEMP_SENSOR_BED 0. I commented out the min and the max temps (also tried it without commenting them out). Made sure it is configured for the right pin...#define HEATER_BED_PIN 8 // BED, but still nothing. I am trying to test the bed and in the meantime can at least use a temp reader to gauge it, but I'd like to to be able to turn on the bed from Repetier. What else do I need to alter?

I've set #define TEMP_SENSOR_BED 0.

You have to define your TEMP_SENSOR_BED to something different from 0, probably 1.

#if ENABLED(PIDTEMP)
  //#define PID_DEBUG // Sends debug data to the serial port.
  //#define PID_OPENLOOP 1 // Puts PID in open loop. M104/M140 sets the output power from 0 to PID_MAX

You could define PID_OPENLOOP and send M140 S55 to heat the bed to 55 PWM ( 0 to 255 is possible )
I never tried it, but it should work without thermistor feedback then.
-Olaf