Canon T90: The infamous HELP/EEE error fixed through guided and systematic troubleshooting

Can this switch be accessed manually or does it reset by simply removing and reinserting the batteries?

Peláez said:

Can this switch be accessed manually or does it reset by simply removing and reinserting the batteries?

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The switch is operated by the battery holder, you cannot reach it.

An artistic effect

I think it's underexposure, although I can't explain the second image. I suspect a drooping shutter curtain.

You can check the shutter visually.

Remove the lens, open the back, set Tv mode, set the shutter speed to 1/4000 second, motor drive highspeed, aim at a bright surface, and look through the back of the shutter. You'll then see whether the curtains are moving evenly or if there are any irregularities.

Thanks so much, Andreas. I don't know the reason for the blurred, non-blurred, or non-smooth photos, but it really hurt to see them come out badly. In the 1970s and 1980s, I took thousands of photographs of all kinds with a Canon FT-10 and a Ricoh, and not a single one came out badly. Now that I've been wanting to relive those times, I think I'll give up. If it's not the lenses that have fungus, they have a cloudy lens, and if not, the camera fails for whatever reason. Anyway, I'm getting discouraged. Best regards.

Peláez said:

Anyway, I'm getting discouraged.

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No, it's time and the manufacturers' misjudgment of the durability of plastics

That's what causes most of the problems.

If it's the sticky shutter, you can fix it from the outside. Every T90 has this problem these days.

See