Couple things to check in the software. First, under "scan information" make sure you check the box that says "off-hook scan" This allows the radio to scan despite your mic not having an off hook detector, or if your using a base, it'll scan even though the mic isn't in a clip. Also make sure "Revert Channel Display" is UNCHECKED. In the "Channel Information" window, ensure the channels you wish to scan have "Scan add" set to Add. Note, the TK880 will only scan channels in the same group by default. If you wish to scan all channels regardless of the group, change the "Group scan" setting to multi (Found in scan information) I think that'll clear the "E" and instead just say "Scan" Note this is for the 49D software, if your using other software you may have different procedures to do.