You need to contact HP Customer support. They will run you through some self tests,that won't work, and then they will offer to replace your 3820 with a 6122 free.(postage and all)
HOPE THIS HELPS.
They have an online chat, and that is what I used to get a new one. You do return the old one to them.(also Fed X Paid)
Wmyers12@cfl.rr.com Eagle
November 2005