Samsung CLX-8640 series - MSOK System Failure: #S1-2511. Turn off then on; MSOK Failure: #S1-2521. Call for Service

4.Troubleshooting
►ErrorCode
S1–2511
S1–2521
S1–2523
S1–2530
S1–2540
►Errormessage
MSOKSystemFailure:#S1-2511.Turnoffthenon
MSOKFailure:#S1-2521.Callforservice
PPMdataisincorrect.Callforservice&changeMSOK
MSOKFailure:#S1-2530.Callforservice&changeMSOK
MSOKFailure:#S1-2540.Callforservice&changeMSOK
►Symptom
MSOKhasaproblem.
►Troubleshootingmethod
1)Turnthemachineoffandon.
2)Iftheproblempersists,turnthemachineoffagain.
3)Removetherearcover.
(Referto3.3.2.RearCover.
)
4)CheckiftheMSOKisinsertedcorrectly.Removeandreinstallit.
5)Iftheproblempersists,replacethemainboard(JC92–02516).
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