Dvd /cd will not play message dvd HO2

SOURCE: dvd wont play ...each time you insert a DVD it shows DVD HO2...

I had the same Problem, player was only 13months old when the error HO2 appeared (typical huh?) anyway 2 years of this thing getting shifted from cupboard,wardrobe,attic, (did'n't want to throw it out cause it cost me £700), finally it came to fix it or bin it time. scoured the net to no avail, lost the rag and half dismantled it..then during all of this ( oops I'm going on a bit LOL)
you can hear a sound as though the disc is trying to be read, after 100's of attempts to get it to work, I finally noticed the disc had not changed position. (disc was not spinning) pointed to the Motor??
what I did to fix this was unplug from main's, remove top cover until you can see the top of the dvd disc, got hold of a pencil with a rubber on one end, plug back in, switch power on, and gently pushed top of disc ( clockwise ) and it kick started it off

that was over 3 years ago and the player is still going strong
I know its a bit rough, but nothing ventured nothing gained ;)