My 10-year-old Sony Bravia suddenly stopped accepting commands. AAA Expert TV Repairs responded within hours and diagnosed a motherboard problem. They ordered the part and returned the next day to install. The problem was not fixed, so they took the TV and 'tinkered'. Within 2 days they discovered a power regulator issue, fixed it and retuned the TV. Polite, punctual and they did not charge me for research and shop time. I like these guys.