[riverdale]

Hi
I am new to the mobileread.
I have iriver ebook reader. I used a usb charger to power my ebook. i have used it earlier as well. To my disappointment when i returned after some time, while i left the ebook open and usb charger attached, i found the display showing lines and broken text at places. Can any one help me as to what went wrong and what ought to be done.
At present i am at Bangalore,(India). The ebook was gifted to me by my son who purchased it from Singapore.