Hello i have just purchased 2x Hp3468B from ebay i have checked resistance DC voltage and AC voltage and all functions are in spec. i have replaced the battery in both of them i used my ps2520G to keep the ROM memory [[ i watched videos on youtube lol]] and all went good i did retest both and all was good for about 2 weeks, i figured i should put them in there new home and when i was done i turned both of them on. both said self test ok but one of them have a C: after the digests so was wondering what this means? thank you for your help and sorry if this is in the wrong place.