Why Harry Potter "cannot" be set in 1991-?

[Catlady (Rita Prince Winston)]

No: HPFGUIDX 79370

--- In HPforGrownups at yahoogroups.com, Troels Forchhammer 
<t.forch at m...> wrote:

> The quotation most specifically /does/ say PlayStation. I don't
> know if this is changed in the Scholastic/Levine version, but
> the Bloomsbury edition has Dudley chucking his PlayStation out
> of the window (HC 3rd printing w. wrong wand-order and 8th
> printing PB w. correct wand order).

Dudley chucked his Playstation out the window, thus was no longer 
able to play Mega-Mutilation III, in GOBLET OF FIRE, set in 1994, 
when (the list has agreed) Playstations were not yet available in UK 
or US, but had been test-marketted in Japan.

I am not aware of any reference to a Playstation in HARRY POTTER AND 
THE PHILOSOPHER'S STONE. Please give me a quote with enough context 
that I can find where in the book to look it up and see if Scholastic 
changed it.