Newb Question has be baffled

Greetings to all and thank you in advance,

If this question is in the wrong area please let me know. I am a smaller cellular dealer that occasionally sells two way radios and programs them. Usually we order them new and program them and that’s it. Well, a recent customer wanted to order some used PM400s. We found some (20) and created a channel lineup that functioned on all the units we tested and cloned them.
My problem is the customer called and told me that half of those radios wont send. So I went up to their shop, picked up a good one and two of the bad ones. Got back to my office and read both the good one and the bad ones and compared the conventional personalities on both. They seem to be the EXACT parameters on both units. However, I read the good one and cloned the two bad ones again and the issue is still there. The bad ones won’t even key up when the mic is pressed on the bad ones and I can’t get them to communicate with each other send/receive.
Can anyone point me in the right direction? I don’t know a lot about these radios and of course the company needed them functional yesterday as they will be taking them out of town. Just as a side note, they also ordered 20 CP200s and they were programmed to match the channels of the PM400s and they all work perfectly. I’m tearing what’s left of my hair out here.

Thanks again,


If this account is worth keeping, I would take the radios to the nearest Motorola dealer and have him check them out. There is obviously a problem with the radios. You didn’t say if they are used, which I am assuming they are or they would be covered under warranty.