I fixed mine when I got the radio from a seller
from eBay, like I said, he said it was working fine, but it
wasn't
You have a choice: take the chance or upgrade to currently produced
radio with decent factory parts availability.
I had a old parts ft817 so I removed it from there
If affordable, it's nice to have a parts department carcass or two
from which to liberate parts. I have a number of HW-8s serving in
that capacity.
I am getting fed up getting things from eBay And
the seller's saying it was all working,
Not to cover for unethical sellers, but modern day, 160M-70cm
mulit-mode rigs are complex little beasts - which makes thorough
check outs or spec verification challenging at best.