For your computer to see your device, you'll need to turn it on. When you plug it in, it'll turn off, so you'll manually need to turn it on.
[header] How to update the master database of a uniden homepatrol using homepatrol sentinel [title] Install and open the homepatrol sentinel software. [title] Backup your device using sentinel, to ensure no avoided channels and any settings are re-scanned the next time the item is turned on after the update. [substeps] Bring your device to nearby and plug it into your computer.