Mark O Lake Forest , CA November 04, 2017 Appliance: Samsung Washer WA50F9A8DSP/A2-0001 Samsung Washer Wa50f9a8dsp/A2-0001: No error code (no power after power switch on). How to replace Washer Main Control Board. 1. Could not see any error code because no power was coming. 2. Checked circuit connectors, but result was uncertainty. 3. Check a water drain pump resistor -- it was good resistance value. 4. Found problem in Main PCB assembly and fix it. 5. Power was come back 6. Start quick test mode, and no error code was appeared. 7 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 2+ hours