5184-2191 - HP 120-Watts ATX Power Supply for Pavilion 6553 5184-2191 - HP 120-Watts ATX Power Supply for Pavilion 6553 $103.50
5184-5887 - HP Power Adapter Shelf for 8-Ports Switch Series 5184-5887 - HP Power Adapter Shelf for 8-Ports Switch Series $172.42