I can not solve this problem. Please help me.
The magic mirror is find when I use it with TV monitor through hdmi cable.
But when I use vga monitor to make the real mirror and I use hdmi-vga cable. The screen turn on and I can see the desktop. When it start mm, the screen is black and the power supply led turn off and on continuosly. Please help me solve this.
It is most likely your hdmi-vga cable but posts here you may find the answer https://forum.magicmirror.builders