This article only applies to: SP111-33
The manufacturer of the SP111-33 approved longer lower case screws in locations (1) (2) (3) below to reduce the likelihood of them backing out during customer handling.
Replacing screws is NOT a silent service activity. This solution can be applied if the customer has complained of the problem or the repair tech noticed missing screws during the repair.
Locations 1 and 2 can have the screw increased
To 2.0*6.1mm w/ lock washer (86.VA2N7.001)
Location 3 has mechanical limitations. It can only accept a screw 0.2mm longer than the original screw. The design team says even this small amount is expected to help.
Acer has provide buffer of this special 2.0*5.2mm screw.