Nikon D60 Help

[DannyC71]

So I have a Nikon D60 and the mirror is stuck in the up position. I have a fully charged third party battery in it, I do have a genuine Nikon battery on the way. But I don’t believe it’s a battery issue. The lever inside the lens mount, as shown in the attached images, is stuck, won’t move at all. My F90X has a similar lever and it moves freely. So is there a way to get this lever unstuck that doesn’t involve a pricey repair? TIA

 

[koraks]

Consider the possibility that the stuck lever is not the cause of the problem, but a symptom. It sounds like the shutter release/mirror cycle got interrupted/stuck and the result is that this lever is not released and the mirror stays in the up position. The question remains what the cause is of the exposure cycle being interrupted.

I have a fully charged third party battery in it

How old is that battery?