Hewlett Packard B77100-66280 PROCESSOR GRAPHICS board. Needs a new QTC85 AA 3.6V Lithium battery        

P/N: B77100-66280 , 77100-66280

PCB: 77100-26280  REV B

Datecode: 3523 (check this with the service manual)

Compatible model:  SONOS 2000, SONOS 2500 (M2406 M2407)

This assembly has been handled and stored following ESD safety guidelines.