Hi @ski_kc06 ,
Search online for a reputable, professional electronics repair service that mention that they do audio equipment repairs and ask for a quote.
Have you checked that the power outlet that the speaker is connected to is working by plugging in another appliance e.g. a hair dryer, to see if it was working?
You could always try to fix it yourself as well.
''Disconnect the speaker from the power'' and then open the speaker and check for any component damage or maybe even a blown fuse on the power board in the speaker. The power board will be the one where the power cord connects to.
Here’s the ifixit [guide|10627] guide which may help as it shows how to open the speaker so that you can gain access etc.
If you spot something and are not sure or even if you don’t see anything wrong post some images of the board back here.
Here’s how to do this on ifixit [guide|21499]