BPI-M64 LCD and HDMI connect at the same time android can't work!

I use lcd version img . first I connect the lcd and hdmi with M64 at the same time,then open power,the android will stop at uboot ,if I connect lcd only , it is normal. so what should to do? when after into android system ,we connect hdmi ,it’s normal too.

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I have the same problem, did you solve it? Any help would be very useful!