Thanks Friends for responding to my question. Mr. Tom, your magnet trick was mind blowing, I tried it and the one that was working came on as you said and the other did not respond at all. Neat trick as you said to check for this problem. Mr. Shane, Thank You, sir, for responding and no I haven't tried to exchange batteries for fear of voiding the warranty. I feel, sir, for the amount of money invested in such precision equipment things of this nature should be left to qualified repair personnel. I am as all men like to tinker with things but I know when to leave well enough alone. The dealer only purchased two of the levels and told me the other day he sold the second one. It looks like they order new Festool products only when I request something and add an extra for display. I think I am their biggest Festool customer in that store and they use me as reference for explaining and selling the Festool line to other regulars. Mr. Shane it would be quicker if Festool would just send me a replacement light and we could be over this problem. This would save me 70 miles of round trip driving to replace. I have already invested $150.00 in the level and would like to avoid extra cost associated with gasoline and traveling for something this simple. Would this be possible, sir.