Are you worried whether your 16x2 Lcd is working or not? Are you worried whether it is burned or working well? Here is the solution, just follow the below steps to find your solution...

FOLLOW THESE STEPS :

>> Connect the pin vcc pin to 5v

>>Connect pin Vee and gnd pin to ground

>> Connect Led+ to 5v

>>Connect led- pin to ground

After you made these connections then Lcd look somewhat like this below  i.e the lower line will be brighten..

If your Lcd is not working well, then both the lines will be bright shown below

Important Note: Most Lcds can withstand upto 9v( but not all), and dont worry if u

applied 9v without knowing it.. Do above steps with 5v only...