UDOObuntu hdmi lcd display issue

Hello

I used uDoobuntu 2.3.0 (ubuntu 14.04 LTS) prebuild img from https://www.udoo.org/downloads/
and I have hdmi display which is look like
(https://www.amazon.in/Waveshare-Cap...8&hvtargid=pla-406645444295&psc=1&ext_vrnc=hi)

so when I connect this HDMI display to my udoo neo board it shows LCD blackout issue on LCD corner side
I upload some image below here
I don't know why this happening because I follow this tutorial for run hdmi display
https://www.udoo.org/docs-neo/Hardware_&_Accessories/HDMI_7inch_touch.html

please help me with this issue

 

Looks like an hardware issue.
Is it an issue on the Neo only or do you see the same issue if you connect this display to another computer?

 

It is working fine with the computer only problem occurs on udoo neo board

 

I have never seen this. Do you power the display from an external power device? The USB of the Neo is not very powerful.

 

Udoo neo board powered by 12v 2A power adaptor
7" HDMI display's hdmi and USB directly connected to the board.

 

After some R&D I found the issue in hdmi display
the screen buffer is not clear after disconnect hdmi cable

 

Hi bro,
How did you resolve this issue?