Yesterday I powered off my HP10G2 tablet that was 90% charged. Today I tried to turn it on and the startup screen came up but then it went black and I’ve tried to hard reboot by holding the power button for 8 seconds and hard reset it by holding the power and both volume buttons for 30 seconds but neither works. The menu screen doesn’t even come on. I’ve plugged it in but the charging screen with a battery doesn’t even come up. Please help. HP virtual assistant doesn’t have tablet options.