English isn’t my first language, so please excuse any mistakes.
I use Core Qt Image ([url][/url]), generated U-Boot and Kernel 4.4.y (http://wiki.friendlyarm.com/wiki/index. ... load_Links).
At device after start linux running own Qt program. It works very well.

But sometimes my touch display turn off. Linux and Qt program still running, only display not working. It happens irregularly (about 5 - 60 minutes) and not always. Use power source from laboratory power supply (5V/2A).

Any advice?

Thank you.