No lights on Control Board: White rogers 50A51-225, fast blink on the fan control interface board (Amana #20158901) I reset the limit switch by the blower and the one in the burner box. I cleared the vacuum line and checked the ignitor (which seems intact) There is no clicking or activity from the board when I supply power to the unit and hold the door panel safety switch closed. The Tstat has power, but the board makes no lights. Before I spend $$$ on a control board replacement, is there anyway to confirm the board is bad or any other checks I can run? I have another identical running unit that I could swap parts out on to determine which is bad, but before I do that, I thought I would check with those wiser and more experienced than me to make sure I'm not overlooking something stupid.

What's the model number on the furnace? If you have a voltmeter check the R terminal on the WR board.