Hardware Maintenance Manual - Lenovo M4400s
Table Of Contents
- About this manual
- Chapter 1. Safety information
- Chapter 2. General checkout
- Chapter 3. Important service information
- Chapter 4. Status indicators
- Chapter 5. Fn key combinations
- Chapter 6. Locations
- Chapter 7. FRU replacement notices
- Chapter 8. Removing or replacing a FRU
- General guidelines
- 1010 Battery pack
- 1020 Bottom slot cover
- 1030 Memory modules
- 1040 Hard disk drive assembly
- 1050 PCI Express Mini Card for wireless LAN
- 1060 mSATA solid-state drive
- 1070 Backup battery
- 1080 Base cover
- 1090 Media card reader slot board
- 1110 Fingerprint board bracket and fingerprint board
- 1120 Thermal module assembly
- 1130 DC-in connector
- 1140 Power board
- 1150 System board assembly
- 1160 Touch pad assembly, speakers, keyboard bezel, and LCD unit
- 2010 LCD front bezel
- 2020 Camera and microphone board
- 2030 LCD panel, LCD cable, and hinges
- 2040 Antenna assembly and LCD rear cover
- Appendix A. Notices
•Improperdiscinsertionoruseofanopticaldrive
•Diskettedrivedamagecausedbypressureonthediskettedrivecover,foreignmaterialinthedrive,
ortheinsertionofadiskettewithmultiplelabels
•Damagedorbentdisketteejectbutton
•Fusesblownbyattachmentofanunsupporteddevice
•Forgottencomputerpassword(makingthecomputerunusable)
•Stickykeyscausedbyspillingliquidontothekeyboard
•Useofanincorrectacpoweradapteronnotebookcomputers
Thefollowingsymptomsmightindicatedamagecausedbynonwarrantedactivities:
•Missingpartsmightbeasymptomofunauthorizedserviceormodication.
•Ifthespindleofaharddiskdrivebecomesnoisy,itmayhavebeensubjectedtoexcessiveforce,
ordropped.
Powersystemcheckout
Toverifyapowersymptom,dothefollowing:
1.Turnoffthecomputer.
2.Removethebatterypack.
3.Connecttheacpoweradapter.
4.Checkthatpowerissuppliedwhenyouturnonthecomputer.
5.Turnoffthecomputer.
6.Disconnecttheacpoweradapterandinstallthechargedbatterypack.
7.Checkthatthebatterypacksuppliespowerwhenyouturnonthecomputer.
Ifyoususpectapowerproblem,refertothefollowingtopicsforacheckout:
•“Checkingtheacpoweradapter”onpage22
•“Checkingoperationalcharging”onpage23
•“Checkingthebatterypack”onpage23
Checkingtheacpoweradapter
Ifthecomputerfailsonlywhentheacpoweradapterisused,refertotheinformationinthistopictocheck
theacpoweradapter.
•Ifthepower-onindicatordoesnotturnon,checkthepowercordoftheacpoweradapterforcorrect
continuityandinstallation.
•Ifthecomputerdoesnotchargeduringoperation,goto“Checkingoperationalcharging”onpage23
.
Tochecktheacpoweradapter,dothefollowing:
1.Unplugtheacpoweradaptercablefromthecomputer.
2.Measuretheoutputvoltageacrosstheplugoftheacpoweradaptercable.Thecorrectvoltagesare
showninthefollowingtable.
Pin
Voltage(Vdc)
1+20
20
3
Ground
(20V)
1
3
2
Note:Theoutputvoltageacrosspin2mightdifferfromthevoltagethatyoumeasure.
3.Dependingonthevoltagethatyoumeasure,dooneofthefollowing:
•Ifthevoltageisnotcorrect,replacetheacpoweradapter.
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