Lenovo M55p - ThinkCentre - 8808 - Page 77

IfanexternalROMmoduledoesnotproperlychecksumtozero.AnexternalROMcanalsoissueaudible
tones,usuallyconsistingofonelongtonefollowedbyaseriesofshorttones.
Usethefollowingtabletodiagnosebeepsymptoms.
BeepSymptomFRU/Action
1-1-3CMOSread-writeerror1.RunSetup
2.SystemBoard
1-2-2-3ROMBIOScheckerrorSystemboard
1-2-1ProgrammableIntervalTimerfailed
Systemboard
1-2-2DMAInitializationfailed
Systemboard
1-2-3DMApageregisterwrite/readfailedSystemboard
1-2-4RAMrefreshvericationfailed
1.Memorymodule
2.SystemBoard
4-4-4-41st64KRAMtestfailed
1.Memorymodule
2.SystemBoard
1-3-21st64KRAMparitytestfailed
1.Memorymodule
2.Processor
3.SystemBoard
2-2-3-1Interruptvectorloadingtestfailed
Systemboard
2-1-1SecondaryDMAregisterfailedSystemboard
2-1-2PrimaryDMAregisterfailed
Systemboard
2-1-3Primaryinterruptmaskregisterfailed
Systemboard
2-1-4SecondaryinterruptmaskregisterfailedSystemboard
2-2-1Interruptvectorloadingfailed
Systemboard
1-3-1-3Keyboardcontrollerfailed
1.SystemBoard
2.Keyboard
2-2-3CMOSpowerfailureandchecksumchecksfailed
1.Battery
2.SystemBoard
2-2-4CMOScongurationinfovalidationfailed
1.Battery
2.SystemBoard
2-3-1Screeninitializationfailed
1.JumperonJ28
2.SystemBoard
2-3-2ScreenmemoryfailedSystemboard
2-3-3ScreenretracefailedSystemboard
1-2SearchforvideoROMfailedSystemboard
Allotherbeepcodesequences
Systemboard
ContinuousbeepSystemBoard
Repeatingshortbeeps1.Keyboardstuckkey
2.KeyboardCable
3.SystemBoard
Chapter7.Symptom-to-FRUIndex71