Their first significant effort, an attempt to import televisions, failed. The group rebuilt itself within a year by conducting quality checks on computers for new buyers. Lenovo soon started developing a circuit board that would allow IBM-compatible personal computers to process Chinese characters. This product was Lenovo's first major success. Lenovo also tried and failed to market a digital watch. Liu said, "Our management team often differed on which commercial road to travel. This led to big discussions, especially between the engineering chief and myself. He felt that if the quality of the product was good, then it would sell itself. But I knew this was not true, that marketing and other factors were part of the eventual success of a product. " The fact that its staff had little business experience compounded Lenovo's early difficulties. "We were mainly scientists and didn't understand the market", Liu said. "We just learned by trial-and-error, which was very interesting—but also very dangerous", said Liu. In 1990, Lenovo started to manufacture and market computers using its own brand name.