u/Cheesy-chips

I was gifted this sealed Sony Walkman WM-EX194. Put batteries in and the battery indicator is lit, but the bits inside won’t spin. I can hear white noise from the Walkman, and feel a slight humming, but nothing through headphones. Any advice on how to fix it? The instructions say to leave it in playback mode if it hasn’t been used in a while, but that’s all I’ve tried so far. Cheers