In my case, someone said me that the usb-type-c port didn’t work and some optoelectric components either. If someone knows how to find exactly the opto and how replace it, I would try to do it but it’s very difficult for me to do that in this moment. I’m thinking to throw it away to recycle but the screen is new and works perfectly. It’s a pity that there are no more info to repair this things.
I don’ t know anything about the z500kl but it could be the same problem especially, if you don’t see charging icon when plug in to AC. But in my case I can’t hear anything either.