dell Inspiron 6400 few issues !

hi bought this for son in law to get him finished at college as his laptop was goosed needs to use external speakers for sound has a loose hinge battery shot these items can be replaced cheaply from gumtrees sister site hinge 3 or lid 15 battery 13 speakers or PCMCIA card ?? windows 7 updates done 1.6 dual core 1gb ddr2 ram 80gb hardrive 99ono 07923141424