Thank you for taking the time to post and welcome to the Bose Community. I'm sorry to hear you're not able to power up your SoundTouch 20 system - but I'd be happy to assist.
Did this randomly happen overnight, and was this caused by a recent power surge or power cut? Have you tried a reset by unplugging it from power for two minutes, connecting it to a new power outlet, and testing again? This will help clear any underlying issues - do let us know if things improve or not!
I tried multiple times unplugging the speaker. The bar on the screen continually fills once the speaker is plugged in then the screen goes blank. After alittle while the bar comes back fills and the screen goes blank again.
Thanks for updating us on this!
Let's explore these troubleshooting steps here, should the issue still persist after attempting these steps I would recommend reaching out to us via the Contact Us page here to explore service options for the system.