T113-S3 LVDS Voltage


I got a mangopi dual T113-S3 and now I am testing the lvds function.
The timing is right and I got colorbar and my own picture and video.
But I found that the screen seems got bit loss on LVDS0.
Using scope and found that V1P and V1N is about 1.8v but other pair is about 1.0V~1.2V.

Anyone know how to lower the V1P and V1N voltage?