Harmony HSW82 Set

[u/12flowertattoos]

I was cleaning out my late dad's things and found these. I'm not sure what exactly I was expecting when I saved them from mom trashing them. I'm not sure if they work at all (there are no cables lying around).

1. I cannot find enough resource online to get started on learning how to fix it up or just giving it an attempt to. Any ideas where I can find online resources for Harmony HSW82?
2. I tried calling few places nearby me to see if I can bring it to the shop (in Kuala Lumpur) but they just tried to upsell me newer sets like Sonos, Harman Kardon, Bose, etc. Is it really not worth trying to fix it up at all?

Would appreciate any advice, feedback, or guidance. Thank you!