Hi Group, can someone help please?.. when ordering boards for led tvs, why are there different white sticker labels with bar codes, but with different numbers for the same board number and model TV??.. for instance, I\'m trying to find a main logic board for a Vizio model#P502ui-B1E.. main board# 715g6924-m01-000-005k.. sticker# xecbotk004030x.. on some boards in ebay, the board numbers match, but the stickers don\'t, how would i find one compatible for the tv??? other than finding the same sticker number??