Err 01 and black spots on Review screen 6D

[PhotosByNeva]

I recently went to Monument Valley on a workshop. Right before I left I started getting the err 01 msg about the lens connection with camera.
Now after I take a picture, my viewing screen will go back and forth making the sky, sun, any bright part black. I have not downloaded the pics yet to see but I believe it is only in the camera. I have 3 lenses the error was only happening with the 28-135mm, now all 3. HELP?! I would love to add a picture of my screen but don't think I can on the mobile app.

[PhotosByNeva]

[Peter]

You have blown the highlights. It is a feature of your camera. It is called highlight alert.

[jrhoffman75]

The blinkies are unrelated to your lens communication error.

Try gently wiping the contacts in the lens opening in the camera with a clean cloth and gently dpress them to make sure thay are all free to move.

[PhotosByNeva]

ok, so what do I do about that? Is it an issue I have to send it to Canon to fix or can I do a hard reset?

[jrhoffman75]

If cleaning doesn't work and a hard reset doesn't solve communication issue then it would need Canon service. I am interpreting your post as all three lenses show the Err 01.

[PhotosByNeva]

Yes, at first it was only the one but then my wide angle and now my 70-200mm is doing it also. That is why I think is it the camera itself. But will try cleaning all contacts.

I read somewhere to use an eraser on them, have you heard this? Of course making sure the camera body is in a position so as NOT to let debris fall inside.

[jrhoffman75 · Accepted solution]

Do not use eraser; you could damage the gold plating. A lens cleaning microfer is all you should use, carefully.

[PhotosByNeva]

Ok, thank you very much!

[anoopgurung791]

Sorry but its not working what should i do?