Hi,
First of all, thank you again for your quick response and sending us the solutions. After following the steps, both Yellow and Green LEDs did not flash. Here I give some details:
In Step 1(b), after I connected the micro-USB to PC, EVB was powered on, but Green LED did not flash. Anyway, I continued to work on Step 2, 3 and 4. In Step 4(a), I did find "Program Ok: instance 0" at the end of "log.txt" file (see the link below)
https://sites.google.com/site/johnrhxie2018/itrain2019/rd2/log1.txt?attredirects=0&d=1
Then, I continue to Step 4(b)(c) and to Step 5(a)(b). In Step 5(b), it displayed the successful message "Upgrade operation is finished, your device is updated" . However, in Step 5(c), both Yellow and Green LED did not flash.
I am looking forward to your solution.
Thank you.
John