2) Relative ease of repairs: By the early 1980s most TV and radio manufacturers were producing solid-state sets with a modular chassis design, which meant technicians needed less formal training to make repairs as component-level troubleshooting was no longer frequently practiced or required. This was similar to the situation with older tube sets, where repairs often only took swapping out a vacuum tube. By the end of the decade, some solid-state TV manufacturers were producing sets in which the electronic circuit, in totality, for the entire receiver was contained on a single printed circuit board that was replaceable. Today, the opposite is true. Flat screen television receivers are more difficult to repair than old CRT sets were, and replacement parts are hard to obtain from the manufacturer, with long lead times.