Hey guys. I just got a Lynx II at a garage sale and after putting new batteries in it, I found it worked fine except the buttons were sticking. I completely disassembled everything to clean and now after putting it back together it will not power on at all. I triple checked all of the ribbon cables and yes the batteries are seated the right way. No caps appear to be blown and all of the traces on the button membrane are clean and intact. What do you think could be causing this?