a little contribution I had this in a spare txt file I had wanted to give this to some people who want to se HP there only 5 S/'s I haven't checked if they have warranty or not so please go ahead and check and just be cautious when Seing hope everyone gets a successful se. please keep not do not message me asking for help you will be ignored.S/N's 6CM610138L CNK6431VZV 6CM610153V CNK6431XSM CNK6511MMV