Thanks all. It turned out to be the power brick.
Laptop will not start with or without charger. When the power button is pressed it lights for about a second and goes off and the charge light blinks once. I suspect the charger but don't have another one that fits. It is putting out 19.6 and 4.5V measured with a meter but that is at no load. I removed battery and held power button for 30 seconds, re-installed. No change. Charge indicator blinks 1 second, 1/2 second, then about 1/8 second. Waits and repeats. Is there a list of blink patterns available. Laptop has been powered off and power disconnected for 6 months. Thanks, JH
Charger blink pattern