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check to see if your remote is actually working, If you have a digital camera with an lcd display point the remote at the camera and push a button on the remote, if the remote IR light is working you should see it light up thru the camera when you press the buttons.
Vizio is famous for having main board issues. If you have replaced the IR board the only two other items it could be is a broken wire from the IR to main or the main board has an issue. Nothing else can stop the remote from working provided the remote is working properly.
tried with reset doesn't work, ok it could be the IR sensor at the front panel of the tv doesn't work. but before you replace it you need to ensure if your remote controller is working. have you tried to check the remote with camera trick just to know if the remote controller is sending light to the IR sensor of the tv.
Sounds like the IR sensor in the TV may be faulty, since you have now tried a couple remotes. Make sure nothing is on the IR sensor like tape, plastic, etc. IR sensor repairs are a fairly cheap and easy repair that can be done at your local tv repair shop. If you are still in warranty you can call Philips and tell them that you tried 2 remotes (1 brand new) on the TV and neither work. They should offer you a repair option. If you have any questions regarding your Philips warranty let me know.
Let me know model number of your 60 inch LG tv to find out possible cause of no remote operation. I do not think that IR receiver is bad in your tv. Regarding dusty IR receiver lens, you can confirm it by sending remote signal by very close distance to tv. There are few other possibilities of no remote operation problem instead of bad IR receiver.
Remote sensor on the tv may not be working. Try using a camera by aiming the remote IR sensor of the remote control at the camera lens then press and hole any button and check if you see a flicker of light. If you do, the remote control is transmitting, if not, the remote control is not working. This will tell you if the remote sensor on the tv is not getting the signal from the remote control
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.