So far as I can find out the 10 blinks of the power light is Kickstart 3.x thing. Have you got KS3.x installed?
Apparently it's to give you a chance to get a debug dump from the serial port.
I don't therefore think the number of blinks on the power light really means anything here.
I've also found an indication that a black screen means no CPU detected. I didn't find anything pointing to RAM.
Debug dump from serial port, really? What speed and other settings should one use to get that from an A2000 with ROM 3.1?
