Q:

Why Windows 7 cant see adb device

I have LG Optimus GT540 with broken screen, want to see a screen on my PC to retrieve some data. 
To do this I've installed Android-SDK, set in Windows 7 path to it, but adb devices is not showing my phone.
Device is connected over USB, when I do it I can hear sound in phone that indicates something.
USB debugging is turned on on my device. 
I have installed with android SDK Manager following packets:
Android SDK Tools, Platform-tools, SDK Platform Android 1.6, Google APIs, Google USB Driver
Why I cant see it?

A:

You should install USB Drivers for you device. 
Check this link:
http://www.android-cellphones.org/lg-gt540-usb-driver-download.html

