Power Mac 7100, Quadra Centris 650 – Light Pipe $10.00 Power on Power Mac 7100, Quadra Centris 650 - Light Pipe quantity Add to cart Add to Quote Continue Shopping Category: Macintosh IIvi, IIvx - Power Mac 7100 - Quadra 650 Description Apple 815-6252. Light Pipe indicates power on and resides on the Logic Board and extends through a hole in the case. Power Mac 7100, Quadra and Centris 650.