I just rebuilt my vacuum pump and I still do not have any vacuum.Then I took the main line off the brake boster and there was no vacuum ther either. If anyone can give any information to me for this problem it would great. Thanks!

 

I got the same problem, after a month...but I charged it the opposite way....I mean through the mains, when it was there for 4 hrs and still not going to get turned on I tried the usb cable, PC found there is nokia on USB, but PC Suite found nothing this time. Display dead. Going to ask for replacement.