Out of warranty, they don't want to talk to you. Repair technicians are the buffers between the consumer and the manufacturer. The tech has to know how the device works, what mistakes are likely to be made in its' use and, of course, how to fix it when it fails. The ever-increasing knowledge necessary to do the job takes a tremendous investment. In the tube days, a technician could make a living repairing TV sets alone.
Specialists are rare now.
Repair techs must have a working knowledge of electricity, electronics, optics, physics, chemistry and mechanics. There will always be a need for qualified technicians although the market is shrinking, especially in Consumer Electronics. The tech himself has to adapt to the changing environment, much more so than the buying public. Although his job requires that he know the products inside out, the tech is rarely consulted until after a purchase is made. Many times, I don't see a product until a broken one shows up on my repair bench.