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>got a Nikon D3400 two lens kit
>2 weeks into using it, "ERROR: Press shutter release button again."
>mirror isn't stuck
>won't open it to "oil it" because warranty is still valid
>turn on and off, only 1 photo then error again
>no error when lens is off
>cycle up and down fstop fixes it for a while
>now it doesn't work at all and everything is dark
>pinhole lens works fine
mfw