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Check the remote control for its infrared emission. Check it with fresh batteries. If you wish to get more details about how to check a remote control, please visit this site. One among the posts has details about it. Surf the site with patience. http://electronicshelponline.blogspot.com/
infrared board may have a fault. its in the front part on the board with the buttons. the infrared receiver may be going or gone it looks like a square led. that picks up the signal light from the remote.
Hello Check the remote control for its infrared rays emission. If no emission is there, it won't work. If there is infrared emission, and still your TV does not respond it, the infrared sendor inside your tV will be faulty, and should be repalced. http://electronicshelponline.blogspot.com/ Get ito this blog. There is details about how infrared remote controls can be checked. OK.
Turn tv on manually.Test the remote control all functions are dead or some functions work other don't?Tries take the remote control parts and clean the inner rubbers buttons between the rubbers insulater and the remote circuitries board and the battery connections + - connections with some rubbing alchahol.Then wait awhile like 20 mins and putting it back together again and putting in new battery in the remote,it might work again.If getting the same result than the remote CPU chip is probally dead,remote control devices are very depended on it CPU chip.Try website like Remotes.com to buy an original remote for the replacement.
Testing remote control: The remote control puts out IR (InfraRed) signal that human eyes cannot see, to find out if the remote is sending out the signal or not you just point the remote at the digital camera's Lens (Digital Camera can detect IR), you should see flashing light on the camera's screen when any one of the remote button is pushed. If you do see the flashing on the camera, then the problem is in the TV IR receiver or the main logic board; more troubleshooting with scope will be needed to look at the signals. Parts: www.shopjimmy.com www.remotes.com
there is a easier way to check your remote. Open your radio on AM frequencies, you don't need to be tuned just noise is perfect, then bring your remote near the antenna and press some button. You will ear the frequency in your radio. If it works this way but not on the TV make sure to press the TV button before using it (if the remote is universal).