Praktica BCA winding lever and mirror stuck

Hello !

I acquired a Praktica BCA Electronic two days ago, and it worked fine

I was able to take a couple of pictures

Yesterday I tried to take a pic, and the shutter closed itself but didn't open again

I couldn't see anything but black in the viewfinder

The shutter release button is pressable, but it doesn't trigger anything

I cannot move the winding lever

I changed the battery, thinking it might be that, but apparently it's not.

I removed the lens and I could see that the mirror is stuck up. I tried to move it using the lever on the left of the entry, but it just springs back up.

Do you have any idea what it could be ???

 

Kind regards, any help will be very useful

The 1/60 second on the dial sets the camera in mechanical mode. You may try that; though, I am not sure if it will get corrected. But worth trying. Good luck, SP