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The Sony remote may be working fine. You may have to test it on another Sony TV such as at Best Buy or at a friend's place. Some of the Sony TV's had a bad or defective infrared(IR) board. If the IR board fails, then the TV will not respond to the remote. The TV will work fine with the manual controls, but will not respond to the remote. If you are handy with taking apart computers, then taking out the IR board is not that hard. It looks like a computer memory or RAM board. One can buy a replacement board on the internet or send your bad IR board in for repair. I did just that last week by sending it to a repair service. I got the board back in less than a week and installed it. The Sony TV works fine with the remote now. I found the repair service on E-Bay. There was one in Indiana and one in California. I used the one in California. It all depends on the Sony model, but there appears to be a bunch of models with a defective IR board. Yes, it was really frustrating.
You didn't include the Sony Bravia model that you own - so I can't be more specific. If the TV is set up to use RF (radio frequency) codes instead of IR (infrared) codes; the universal types probably will not work. This is because most universal remotes are the IR type.
The remote included with your TV may have inadvertently be switched to send the codes as an IR type while the TV will respond only to RF type codes. It may also be that the TV was changed to respond to RF codes only. Either way, check your manual (or your TV menu settings) to see how to set the TV and the remote to work in the same mode.
If you can't find your manual, reply with your TV's model number - and if possible the remote's model number, too. I'll see what I can find that is specific to your TV.
I hope this helps & good luck. Please rate my reply. Thank you.
It is possible the IR sensor is bad. Most of the time if it is a remote issue, the light on the remote will not light up. Does the remote that came with tv still control any functions? I would try the remote that came with the tv, and then go from there, but it sounds like your IR sensor has gone out on you.
Make sure you have fresh new batteries and installed correct,point the remote at the tv,make sure nothing is blocking the view of the IR sensor,get close to tv,but not to close,press power.If it still dont work, try the tv itself,press power,you may need to replace the remote,or the IR sensor, hope this helps.....
The problem for me was the TV giving off IR signals that interfered with DISH's poorly designed remote. When the TV's room ambient light sensor was turned on and it became dusk outside the DISH remote would stop working. Moving the receiver away from the TV helps but the problem is not eliminated until the light sensor is turned off. Until DISH corrects this poor design there may be no other viable solution.