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adv7181b failed

Problem about adv7181b


Hi, we got a problem when using adv7181b for video decoding, where BF561 was used to configure it through i2c. The device worked well for four years, each year we would use it dozens of times, and the last time it worked well was January 2016. But last Friday it only worked for about five minutes, and then failed. If it works well the output data will meet the requirement of itu-656, and when failed it didn’t. When it failed the input signal to 7181b is correct, which including the power supply, reset and clock. But there was no feedback when we use BF561 to read or write the register of adv7181b through i2c.


Can anyone tell me the possible reasons? Thanks!







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