I originally bought my 500 back when there were some people having various issues with their 500's, and the first firmware update had been released to deal with the issues. I bought my scanner from a dealer that assured me that all of their PSR-500's already have the updated version of the firmware running in them. Then, I made the mistake of requesting to have the scanner "bench tested" before it is shipped out, so that any problems could be identified "before" I received the scanner. Well, I ended up with a scanner in the 1300 ser. no. range, that was in a beat-up box, and I had the awful feeling that I had just received a scanner that someone had "sent back". Anyway, I was scanning through the LED's via the "global" menu, and when I got to LED #5 , which is blue, it was lit, but then went extinguished, right before my very eyes. I sent the scanner back for a "warranty exchange", and received a replacement ( after making it abundently clear that I did not want the scanner bench tested.) which has a serial no. in the 1800 range. Everything was in pristine order as requested, including the box, and I have not had a problem with any of the LED's so far, or with anything else. Lesson learned for me, is to never, ever, request to have a scanner "bench tested" when I make a purchase. It took about a month and a half to get it all straightened out.