crwdns2936637:0crwdne2936637:0 crwdns2853008:0crwdne2853008:0 crwdns2918746:0crwdne2918746:0
crwdns2918538:0crwdne2918538:0

crwdns2934241:0crwdne2934241:0 G Philip C

crwdns2934249:0crwdne2934249:0:

Open it up...change the round "cmos" battery. I just performed this repair on my 531.

crwdns2915684:0crwdne2915684:0:

open