PSP buttons conductive film for the following keys， press the button for a long time， not working， it is very likely the reason， because a long time with a conductive adhesive will not resilient， even by broken， causing the key impossible， this is a domestic assembly， for one， or even more than a few spare can buy. Only for fertilizer P， PSP 1000 use. ， PSP2000 3000 incompatible with.