I tried installing an HP LaserJet 4L that had been out of use for several months. Windows 98 Plug & Play recognized the new hardware and loaded a driver. But, when I tried a print job, all I got was one sheet of gray streaks, then all the panel lights started flashing. Nothing but a power disconnect could reset it. I tried installing a different driver downloaded from the 'net, but the results are the same. I know little about printers--is this a hardware problem?