SN75DP130: Display no signal

Hi,

Does ABA cross check show the failure following the unit or the board? If the ABA check follows the unit, can you please contact the local TI FAE to start the FA process?

Thanks

David 

Hi,

Is HPD_SNK being driven high for both the good and the bad unit? 

Do you have a scope that you can use to probe the output? Are you seeing any signal on the DP130 output?

If you change the cable (long or short), do you then see the video output?

Thanks

David

Is HPD_SNK being driven high for both the good and the bad unit? 

Jabil:Yes,  HPD_SNK (pin 11) signal is measured high(3.3v) for both good and fail boards,

Can you provide more detail on the condition that caused the unit failure, power cycling, unplug/plug the cable?

Jabil: The unit failed at start up shows no display information via the boards(see pic below), checking with related cable and connector are OK,  and re-plug the cable could show the display windows. But then reboot the power, the failure shows again, it's not related with cable contacting.

we replaced the material  SN75DP130, then the failure could be solved with new component, and if we place the defect material on other board, show the same fail again.

Jack

If you are able to display windows with unplug/plug the cable, then the unit itself looks to be ok. Do you have a scope that you can use to probe the output for further verification? 

Is this a source or a sink application? Do you have a DP protocol analyzer to decode the DP link training?

Thanks

David

We Measured HPD _SNK (Green), HPD_SRC((Red), P3V3 (Blue)on IOM, pls find follow information:

Passing IOM

Passing IOM

Failing IOM: