I have a new Tenma 72-7930. I sent one back as it was faulty. It kept reading "connect test leads" even when everything was connected correctly. It also wouldn't read accurately. I exchanged it for another of the same, and have the same problem, except this one works; I have tested batteries, capacitors, etc, and it seems to work fine. However it always displays the message warning me that there is an incorrect test lead placement. I've trouble-shot everything, changed the battery for a new one, and this message never disappears. Anyone know why? Do I have a faulty meter? Thanks in advance.