ISO: electric piano repair

ISO: Your brain and kind support to help me repair / find out the issue of this piano.

Anyone good at electronics repairs?

My beloved vintage electric piano has died…? It still turns on, like it makes a humming noise when switched on, but no lights come on, nor no sounds by pressing keys. But I am still having a hope as it still running a power seems like! 🤞🤞🤞

Please let me know if you, or you know someone who maybe able to help.