Rubber band worked for me!
I had a power meter attached. During the process, there was a 150mA pulse approximately once every 10 seconds while the power button was depressed.
After about 5 hours, the LED turned into a fast blinking red light, and charging rate increased to 500mA. When I saw this, I removed the rubber band.
A short time later, the screen turned on, Android booted and charging rate went up to 2000mA.