i try to read using mxkey dongle orig. but status is all clear @ valid
so i decided to open the unit and try to clean all part's by thinner but sad to say still thesame
then second option's, i replaced all capacitor's and check diagram each connection's but all is ok
my third option's is reball this kind of i.c and after placing this i.c, the contact service gone totally.
Result:
