C3 laptops sometimes identified as pre-B3 (B2)
|Reported by:||wad||Owned by:||rsmith|
|Component:||not assigned||Version:||not specified|
|Deployments affected:||Action Needed:||add to build|
Some C3 motherboards are erroneously identified as B2 motherboards by the EC. This can cause brick (or brick-like) symptoms. They are running Q2E12 firmware.
The hardware components are fine -- the board ID voltage is ALMOST identical between working and non-working units. The non-working units have board ID voltages slightly below 2.06V (the ideal for C3), but still well within tolerances.