Got my product in October or November.  The serial number is not on it and I have not idea what the serial number is.  The laptop will no longer turn on and does not seem to charge at all.  I cannot get the extended warranty company to help.  They say it is under warranty.  I cannot get anywhere with Lenovo since I do not know what the serial number is.  The serial number is not on the out of the product.  I am at a loss.