Never had that problem with the 9000ES, only on older players when trying a new DVD (probably a dual layer disc). The only problem I had with my 9000ES was with the new Superbit DVDs (see my older post on this). But this was a disc problem (dust on the disc), not the player. You might try calling Sony. The warranty should cover it.
Sony DVP9000es lock up problem ?
I am having problems wirh my sony 9000 es, it locks up from time to time when playing cd's and dvd, it freezes up for a couple of seconds from time to time, I know its not the discs, because they work fine in my other dvd player, dealer has no answers, is anyone else experiecing this, thanks