The screen turned off and it wont turn back on!!!
The symptom you described may be due to the main battery being discharged. In many tablets, there are 2 batteries, one main and one used to keep memory intact during suspend mode. When the unit powers on, it turns on the backlight (probably the highest power drain of anything on the tablet) so you can see the icons on the screen. If the main battery doesn't have enough energy, the sense logic will put the machine back into suspend mode, and it will appear to go off. You should plug your charger in, and see if this fixes the problem. If it doesn't then you need to check the voltage of the charger with a meter. If you don't have a meter, you can buy then at Harbor Freight for around $5. With the meter on, and the charger plugged in, stick the red lead of the meter in the center hole, and touch the black lead to the barrel of the power connector from the charger, and you should read some volts. The charger should say on it somewhere it's output voltage. Hopefully you've marked your charger with what device it goes to because many chargers look the same and have the same power connector but are not in fact the same.
Making the screen brighter uses more energy. So if you were successful with your "sun" icon, you could have made the problem worse.
on Nov 27, 2017