I have a in wall speaker wires. 4 of the 5 work, the 5th does not. My plan was to drop a new line in and fish down in the crawl space, then push though an existing hole near receiver. I cannot locate the wire during the fishing, in fact I got a fish tape stuck in the wall somehow.
With my many years of experience running new cables and replacing existing ones in tight spaces I will be able to resolve your issue quickly and professionally. All work will be given a 1 year unconditional guarantee.