1st - if the machine played ok before you moved the glassand reel shelf, that would be the root cause of the 43 error. If you did not play it before the work/adjustment, the error could have been there in the 1st place. You said Hal I digit was blocked which prompted you to make the adjustments. Knowing whether you caused the error or it may have already existed would determine the next appropriate steps. As the digit was blocked, you may be able to assume someone was previously adjusting the glass before you. (Hinting to the error may have been there)
You can manually jumper the reset switch momentarily to activate the reset, just short the wires momentarily to simulate the key turn. I'm sure you can figure a way to do that with the door closed and open. Or you can wait for a key.
The home page has links for vendors that are reputable and will be very helpful with anything you need. Members like myself help also.