Washer Is Banging Very Loudly While Spinning

[tyleriffic]

Hi,  When my LG washer (WD-1274FHB) goes into spin cycle it starts banging so loudly you can hear it clear across the house.  Sounds as though the drum is hitting the side of the washer.  I checked that it wasn't simply out of balance, or overloaded, but even with only a few items of clothing in it, it still caused a racket.  No error codes are displayed.  I had to run to press the power button to stop it from tearing itself apart.

Any idea on what could be broken?  Where I should start?  Anyone have a service manual?

I'm fairly mechanically inclined so i'd like to try my hand at fixing before I make that $500 service call for a $500 washer.

[PARTech]

Maybe a Canadian Authorized tech can pull the model up, I can't...  but the first thing I would check would be springs and shocks.  Take the two screws out of the back edge of the top panel and slide it to the rear, then lift.  Springs are on the left and right sides and with a flashlight you should be able to look down to the shocks that mount on the base of the washer and connect to the outer tub.

And, unplug it first.