I was chasing IO board issues for ever, as I thought my latest Lisa 2/5 could not power up. I then realized that the small light bulb in the On/Off switch was burned out. In case anyone needs one, you can find them on Amazon here:
https://www.amazon.com/dp/B00JNFCUOCI also have 9 spare left to donate if anyone wants to drop by my house in Palo Alto, California
