Line connection is Ok, still , the softwire shows "no connection" , change another PC it works well.
What might have gone wrong with the first computer？
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Please refer to DLP5531EVM user guide: https://www.ti.com/lit/ug/dlpu099a/dlpu099a.pdf?ts=1628820367638&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FDLP5531-Q1