I charged my power bank for a few days but there is no sign of power.

I own a xiaomi red mi note 8.

I was listening to music normal and it started lowering the volume by itself. I tried to get the volume higher a few times (pressing the up volume button or using the screen) but it kept going all the way down.

So i turned it off and cleaned it a little bit just in case something was bothering the button from the outside, or if the system was stuck. Then when I opened it and it still thought that the down button was pressed so it sent me to fast boot. Somehow I managed to boot it properly and now it seems to be okay, but i think it will happen again.

Is it a hardware or a software error? if there’s nothing I can do about it I might need to buy a new one.

Hello all,

I've torn the lid angle sensor while trying to clean the inside of my computer. I've attempted to work around this by putting the computer to sleep before closing the lid however the screen turns back on as soon as it is closed. Also strange that the screen will stay on indefinitely until the battery is dead, even though i've changed my power savings settings are to turn the display off after one minute of inactivity. Its odd because if the sensor is broken and the computer thinks that it's still open, it should turn off after inactivity. The only solution i've found is to shut the computer off before closing it which is not ideal. Finally, i've found replacement cables online however i've been reading that this will need to be calibrated by a professional? Can anyone confirm if this is true?

Thank You

Thank you all for the wealth of information. Just to provide an update to you all, i made sure to purchase a used angle sensor that was taken from a working computer and replaced it on my own. So far everything works as it should!

I charged my power bank for a few days but there is no sign of power.

My phone not support some applications when i try to used them.