Acer AT1921 Service Manual page 34

LOCK UP 4*PCS SCREWS FOR FIXING
RIGHT SPEAKER.
GET THE B/B AND CONNECT THE B/B
AND BEZEL WITH B/B CABLE.
GET THE IR/B AND INSERT THE IR/B
CABLE TO THE JOINT OF M/B.
PUT THE IR/B TO THE LOCATION OF
BEZEL.
LOCK UP 2*PCS SCREWS(F3*10)TO
THE IR/B FOR FIXING.