When EHCS button pushed, I'm getting some noise, but very temporary, then nothing after that.
It is the "!" indicator that is showing up.
Getting the noise when you push the EHCS button seems to indicate power is getting to the motor but the motor is probably stuffed, either through corrosion or carbon buildup inside.
If that's the case replacing the motor is pretty easy & cheap without diving into anything else more costly.... you'll be up for $50-$60 and an hour or 2 of your time.
Discussed & summarised in a lot of threads before, here's a recent one
that also lists several suppliers.... and an ebay link
to the motors. I would buy new, not used, they don't cost too much after all and you don't watch to have to change it out again too soon.
The motor is same as a Honda starter motor (here's a thread
where we collectively found the replacement motor.)
Getting the bike onto the centre stand to remove the EHCS unit is simple, especially if you have someone to help steady the bike..
Put down a couple of pieces of 2" x 6" (50mm) timber spaced to the wheel distance apart, ride the front & rear wheels onto them, get someone to help hold the right side of bike steady while you get off, then hold the centrestand on the ground with one foot while you roll the bike back with the help of the other person onto the stand.
Now you can remove the EHCS unit to change the motor, per the video
If you think it's not the motor, then maybe video whats happening and post it on youtube for us to see.
EDIT:: CHEAP MOTORS... $27!!! http://www.ebay.com/itm/New-Starter-...item43c8cf3ea8