I updated my scanner about 6 months ago. ever since my scanner will not scan/receive when plugged to external power, however when it using batteries its fine I've tried on both my Ac and Dc cords. Any ideas? I need probably take it back to radio shack but since its several years old I don't think I'll get ant where with them, so I thought posting on here might be a better idea.
I'm assuming "will not scan/receive" means it won't power-up.
This might sound like a worthless idea, but if you are using those Radio Shack AdaptATip power cords, which allow you to use a tip (example: the "B" tip) for your radio's power-jack, you might want to check if the tip got inserted into the cord-end backwards (meaning wrong polairty). Remove the tip, turn it 180 degrees, and reinsert its prongs into the cord, and try to power-up the scanner. This probably is not your problem, but since it has an inexpensive solution, maybe it's worth a try.
If the power cords have an adjustable voltage switch, you might want to check that it is correctly positioned also.
If it does power-up but still won't scan/receive, please explain more about what it can still do while on external power.
Hope this helps,