#NEC LC-890
You need to take the 890 back to NEC and let them clean it! I had the same
problem with our 890 after it had been transported in a van over a few
bumps. The loose toner needs to be vacuumed out, but you don't want to use
a household vacuum cleaner. The toner particle size is so small that it
will shoot right out of a normal vacuum cleaner bag.
If your 890 is still in warranty, NEC will clean it for free (they cleaned
ours!). After they clean it, be sure not to put the PC cartridge back in
until the printer is back on a flat, stable surface.