Issue with new gearbest screen. AV stop working.

[jlogo]

Hi, I had my gbz build almost complete and working using the yellow wire of the new gearbest screen.

Suddenly, this evening, the screen turns to black and not back to works using yellow wire(AV1). If I solder to the white wire (AV2) to the pi, the screen works great again.

Did someone have the same experience? Has this screen a power save mode or similar and AV1 has been disabled?

Thanks in advance.

Regards