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DS90UH949A-Q1: DS90UH949 to 948 display no image

Part Number: DS90UH949A-Q1


Hi ,TI team

In our product, for DS90UH949A-Q1 connect to DS90UB948-Q for display screen, but there's some pcs no image. I have confirmed it's 949 board problems,  test 948 LOCK pin is high, but test INTB in below, both existing pull down. Can you help to provide direction or ideas for this troubleshooting?