Motherboard was replaced with a newer model with replaceable fuses. It turns out that 1 of the guide bearings was broken causing the carriage to not move smoothly. This inturn caused to CR 074 error. As for the motherboard, I have no idea. It seems that almost everything is now working, except no printing (hopefully due to the fuse situation). Wednesday I should have a new fuse and bearing-along with that hopefully a working printer. Then I just have to start makin money to pay that bill-out of warranty.