I’m hoping someone will have a suggestion for the Smith-Corona Coronet Electric 12 I recently bought. (SN 6ELJ-166817) The period key has stopped hitting as hard as all the other keys. When it first arrived it seemed to be equivalent to all the other keys. Now it barely registers and I have to backspace multiple times for it to be seen well. It does this even when shifted. The comma is still a solid hit but the period has lost its umpf. I have read that on some electrics the period is designed to not hit as hard so as not to puncture the paper so maybe this is adjustable? Having to always give special attention at the end of each sentence does stop the flow of writing. Any help will be gratefully appreciated.  

The dealer I bought it from suggested trying a drop of oil at the hinge spot. Oiling had no effect. I’ve attached a scanned a page that also makes no sense. Ignore the first line because that’s where I started with the top cover slid back and sadly gave me false hopes. I also wanted to make sure the ribbon was moving. I have no clue why it would be faintest on the left and then darken after the middle. There is a noticeable level difference of sound for the strike force of the period. Any other possible things I can do from here? I can return it for a refund if the fix is not possible.

George