The L LED is Constantly blinking whenever i connect my arduino..... Please help me to solve my problem!!!!!!!!
What sketch did you upload last?
Try uploading File->Examples->01.Basics->BareMinimum to fix the problem.
A fair number of Arduino clones come with blink pre-loaded.
The bootloader will also blink the LED if you have nothing other than the bootloader on it, as might be the case on a new board.
Thus, the LED blinking, in the absence of other issues, is not indicative of a fault condition.