1.the customer use ADV7612+FPGA to implement the LED DOT display video signal process (Outdoor LED advertising display), the whole system in a 1U case. When human fingers touch(static electricity of body) the case's chassis at winter/autumn, the cusomer's screen display a snow point screen and can't recover to a normal display in the screen. And test ADV7612's output, there's no TMDS signals(the customer's code®ister setting referrence our recommend setting ).
The whole signal folw: HDMI -->ADV7612-->FPGA-->internet access to the LED dot display Driver board.
We tried to use our EVAL-ADV7612-7511 for customer's test and we use it to run AVES3& ADV7612-VER.2.9c_AVEB script the ADV7511 can output TMDS normal, but if we take a electrostatic interference at the metal case HDMI input socket, the screen under the balck display, and we check the LLC clock wave as below:
and re-run the EDID/script in AVES3 , there's no reaction from the EVAL board.
Is there any solve solution or advice for this application issue ?