Audio,Screen and Charging

I used a self-test method in OK prompt to test audio & screen. Also I tried it in external microphone and headphones.
I tested the left, right speakers & microphone using browser & TamTammini activities. Also tested the external audio output & Line in function.
How long it took to charge the battery full. (Full Charge).
Tested the OLPC functions while the battery was dead and the power charger is plugged.
Screen frame area tested using frame key function.
Backlight function also tested.

What kind of problems that you had to face?

Issues in updating Activities
Issues in Activity version
Functionality of playing audio when power management is on, was not understood properly.
Screen rotation function in XO 1.5 had issues
Camera in XO 1.5 had issues.