Internal Mic - Scratchy Sounds Canon EOS 90D

[msaluga]

I took video footage with my Canon EOS 90D a week ago and the sound quality was perfectly fine! Then last night, after not using my camera all week, I took more video footage and suddenly these awful scratchy sounds have started. My wifi and bluetooth were both off at the time of recording, my audio compression is disabled, and I even tested it at home just now in a quiet room and it's still making this noise. I tested an external mic and there is no scratchy sound when I use that. Help! Any tricks or quick fixes? If not, is it a costly repair or should I just purchase a small external mic? (Any and all suggestions appreciated!) 

#canoneos90d #canon90d #90d #audio #internalmic

[BurnUnit]

The scratchiness in your video seems to be in the left channel only. Right or wrong, this leads me to think it might be a microphone issue. It reminds me of the random noises you get sometimes when a plug-in jack isn't making a good contact with its mating connector.

I would try a good contact cleaner like DeOxit 5 and give the microphone plug a good cleaning. Don't spray the cleaner directly into the camera connector. Spray the mic plug and while still wet plug it in and out the camera socket a few times to work it in.