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K2E DSP debugging issue

Other Parts Discussed in Thread: 66AK2E05

hello,

Today when I was trying to download program to the K2E (chip model is 66AK2E05),but the computer doesn't connect K2E succesfully,as the following picture,normlly,when connected succesfully,the LED D7 and D8 is lighting,but now only D7 is lighting,what's wrong with my K2E?how can I fix it?Thank you!