I replaced IR board after sophomoric mistake of replacing multiple remotes feel bad for erroneous product review now. Worked for a few hours, then... Stopped. All parts handled with ground strap upon my arm attached to ground prong on unplugged power cable. Unit was dusted with air duster prior to removal of factor/original board. Shopjimmy replacement fixed issue, so tv put back in place and tested again. Still worked. After turning TV on again next day... Unresponsive to TV remote nor the matched BD-Player remote with volume button for Vizio TVs. Ordered another part, and worked again until powering and repowering TV. Wondering if, on startup, the board is somehow getting a big jolt or shift in ground potential or ESD release frying the chip on-board after only a couple startups. I just bought and received in the mail another IR board along with part rebuild kit for the board containing just an ir sensor and either a tiny resistor or mlcc to replace on board. It's possible that it's simply the age of the TV and manufactured parts this is one of the 1st 3D HDTV's released that didn't require powered 3D glasses. However, prior to risking this 3rd and maybe 4th replacement, where else should I look for problems? I was thinking maybe clean connector pins with alcohol to ensure ground on board not getting ESD or stray voltage? I don't recall which board the wires from ir board go to I'm guessing the main and maybe power board?. Maybe a bad capacitor on the power board? I know this TV is notorious for the IR board going bad.... I guess the main questions here are: 1- what can cause the IR board to go bad in the 1st place, and what component actually does go bad? I would guess it's the components in the rebuild kit, so... Would a heftier resistor to get higher amplitude out of the sensor/transducer if in fact i de-solder the sensor and check for output in response to infrared stimuli and it seems to be working but whole board doesn't? 2- Has anyone ran into this before with an IR board popping over and over? Do they even get a power input? I thought it was just the IR transducer powering them similar to the voltage coming off a thermopile from the pilot light on HVAC equipment and the single chip on the board modified the sensor/transducer output signal to cause a given reaction based on remote input and main board processing... 3. Should I just try the new part as it was just happenstance and my luck really does go like that every day?
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