err 20 corresponds mainly to the mechanism of the defective mirror.
but the shutter may be defective, (although err 30 should be displayed), or the motherboard if the device displays err 20 after wetting the device (but this is unlikely).
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it can also be an electronic problem on the lower board when exposed to water.
err 20 correspond principalement au mécanisme du miroir défectueux.
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err 20 corresponds mainly to the mechanism of the defective mirror.
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mais il peut être défectueux.
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but the shutter may be defective, (although err 30 should be displayed), or the motherboard if the device displays err 20 after wetting the device (but this is unlikely).