Hi @Charly.rus,
That’s correct, you only need to hold the Play/Pause button down when performing the Factory Reset. On a side note, however;
With the Play:1 connected to power, and showing the white LED - if you press the Play/Pause and Volume + buttons at the same time, does the light change at all?
If the speakers are indeed failing to respond to this (we would expect the light to flash orange), that would be a sign of an issue with the speaker - in this case I’d recommend that you reach out to the Support Team.
If there isn’t a live chat option available in your region, you can change “Your Country" to United Kingdom, and you should be able to start a chat session :)
As mentioned by @Smilja, please don’t open the speaker, or the assistance we can offer will be limited.