Monitor randomly displays nothing except my mouse

chiyangian Posts 1 Registration date Sunday January 21, 2018 Status Member Last seen January 21, 2018 - Updated on Jan 21, 2018 at 04:43 PM
I just bought this DELL window 10 PC from Costco yesterday. Also, it doesn’t have VGA for my old monitor, so I bought a HDMI to VGA Adapter INSIGNIA. The issue and question I have is below:
1. my monitor randomly displays nothing expect my mouse when I turn on, so I have to hold the power bottom force it to turn off and turn on again until the monitor shows.
2. The Adapter requires me to plug in a USB to connect the adapter and the computer, so I have to use my phone charger, is that really necessary?
3. Sometimes my taskbar just doesn’t work expect my Window bottom.