Hi, I recently recovered a linde t20sp 131 pallet truck from 2013 from scrap metal, after starting it asks for the admin code and after I enter the admin code it asks for the new pin code, which I don't have, and whatever code I enter the display returns every time to the previous screen without activating the flashing green light that signals that the platform is not active, in the manual I read that this light must remain on for 10 seconds because the platform to become active and the truck to become functional, but in my case the light bulb remains flashing, is there anyone who can help me solve the problem? I mention that I do not have the pathfinder diagnostic software. Thank you in advance.