IBM R31, R30 manual Thermal Sensor, Uuid

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Note: If LCD cannot display after change ID code, make sure you write the correct ID code, or try reseating the LCD coaxtial cable connectors.

Thermal Sensor

The system is equipped with sensors to protect against system overheating. By setting system and processor thermal thresholds, the system can turn on the cooling fan or shut down automatically when temperatures reach the defined threshold parameters.

System experiencing frequent auto sensor shutdown may need to reset the thermal sensor threshold and execute the fan test to ensure the normal operation of the cooling fan.

Follow the steps below to set thermal threshold:

1.Install the ThinkPad CE Utility Diskette and restart the computer.

2.Select 2. Thermal Sensor Utility from the main menu.

3.Select 1. Read Thermal Settingto view the original setting or 2. Set Default Thermal Settingto restore the default setting.

UUID

The Universal Unique Identifier (UUID) is a 128–bit number uniquely assigned to your computer at production and stored in the EEPROM of your 24RF08. The algorithm that generates the unique number is designed to provide unique IDs until the year A.D. 3400. Consequently, no tow computers in the world will have the same number.

When you replace the system board, you must set the UUID on the new system board as follows:

1.Install the ThinkPad CE Utility Diskette and restart the computer.

2.Select 3. UUID Data Utility from the main menu then make a selection to read or create the UUID data.

A new UUID is created and written. If a valid UUID already exists, it is not overwritten.

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Contents ThinkPad R30/R31 Hardware Maintenance Manual Page Preface Iv ThinkPad R30/R31 HMM Contents Page FRU Replacement Strategy Introduction Important Service InformationDrive and Diskette Compatibility Matrix Hard Disk Drive Replacement StrategyHow to Use Error Messages How to Read Post Error MessagesSafety Notices Multi-lingual Translations Safety Notice Safety Notice Page Safety Notice Safety Notice Page Safety Notice Safety Notice Safety Notice General Safety Safety InformationElectrical Safety Safety Inspection Guide Handling Electrostatic Discharge-Sensitive Devices Grounding Requirements Laser Compliance StatementThinkPad R30/R31 HMM MT 2656, 2657, 2676 General Descriptions What to do first Read this firstFor Warranty LCD replacement notice FRU replacement noticesScrew notices Restoring the LCD panel ID System board/LCD/Inverter replacement noticeUuid Thermal SensorPasswords Related service informationPower button as reset switch Service Web siteSupervisor password Power-on passwordsRemoving the power-on password Hard disk password Power management featuresDisplay off mode Standby modeHibernation mode Restoring the Pre-installed Software Product recovery programFn key combinations To create Service Partition SP Creating the Service Partition″″ENTER″ Creating a Recovery Repair disketteLoaddskf 1FUDxxUS.DSK a Flash BiosCheckout guide Testing the computerCD-ROM/DVD Hardware InfoUtility Power systems checkoutChecking the AC Adapter Checking operational charging Checking the Battery ASM MT 2656, 2657, 2676 Numeric Error Codes and Messages Symptom-to-FRU IndexMT 2656, 2657, 2676 Eeprom Eeprom CRC1CRC2 Post Beep SymptomsPC133 Sdram LCD LCD-Related SymptomsIndicator-Related Symptoms Keyboard/TrackPoint-Related SymptomsPower-Related Symptoms Dimm Memory-Related SymptomAudio-Related Symptoms PC Card PCMCIA-Related SymptomsPeripheral-Device-Related Symptoms Power Management-Related SymptomsOperating System-Related Symptom Modem-Related SymptomIntermittent Problems Undetermined Problems ThinkPad R30 Cmos RAM Product overviewCD-RW Status indicators Meaning of each icon FRU tests Symbol Color MeaningCD-ROM, DVD, CD-RW, DVD/CD-RW DiagnosticsFRU removals and replacements Mini-PCI cover and Mini-PCI card Battery assemblyThinkPad R30/R31 HMM Memory cover and Memory card Hard disk drive assembly Keyboard CD-ROM assemblyM2.5 x L10 Black Kgf-cm Middle cover Backup batteryThinkPad R30/R31 HMM LCD assembly Keyboard bezel M2.5 x L10 Black Kgf-cm Pcmcia holder Auxiliary Antenna CPU spring SpeakerFan assembly System board Modem Cable with Combo card Modem Card without Combo card Hard disk drive bezel CD-ROM chassis LCD bezel assembly 13.3″ Middle cover on LCD assembly on LED board 13.3″ LCD Inveter 13.3″LCD bracket hinge assembly 13.3″ LCD FPC assembly 13.3″ Wireless reassembly MT 2656, 2657, 2676 Bottom View LocationsFront View Rear ViewPage Switch Locations Description FRU No Parts listThinkPad R30/R31 HMM Hldslg TeacScrew M2.4 Wafer NI LCD FRUMT 2656, 2657, 2676 Inch TFT NMB Description Vendor FRU NoTools Common parts listUS/CA For 2-pin power cordsD1A, BAA, BOA LA-SP-W98-XPLA-BR-W98-XP BOG, D3G, E2GMT 2656, 2657, 2676 ThinkPad R30/R31 HMM Battery charges Option Parts ListThinkPad R31 Part Page DVD/ CD- RW 8X DVD/ CD-RW Status indicators Color Meaning FRU tests Mouse Interactive Tests FRU removals and replacements Battery assembly ThinkPad R30/R31 HMM MT 2656, 2657, 2676 Memory cover and Memory card Hard disk drive assembly Battery assembly on ThinkPad R30/R31 HMM M2.5 x L10 Black Kgf-cm Battery assembly on Keyboard on ThinkPad R30/R31 HMM MT 2656, 2657, 2676 LCD assembly Keyboard bezel Backup battery on Pcmcia holder M2 x L6 Silver Kgf-cm M2.5 x L51 Silver Kgf-cm M2.5 x L5 Silver Kgf-cm CPU assembly M2.5 x L53 Silver Kgf-cm Modem Cable with Combo card Modem Card without Combo card Hard disk drive bezel CD-ROM chassis M2.5 x L5 Silver Kgf-cm M2 x L6 M2 x L42 Silver Kgf-cm M2.5 x L62 Black LCD Inveter 13.3″ LCD bracket hinge assembly 13.3″ LCD FPC assembly 13.3″ Wireless reassembly MT 2656, 2657, 2676 Battery pack Mini-PCI Card slot door ThinkPad R30/R31 HMM Memory slot door Docking connector MT 2656, 2657, 2676 Enable Disable Parts list ThinkPad R30/R31 HMM 27L4301 Sony MKEKME LCD FRU 14.1″ LCD Bezel for W/W 46L6329 Keyboard KBD ASM Belgian Common parts list Description FRU No Models MT 2656, 2657, 2676 EFU, BFU, A5U, AFU ABG, AHG, AFG, BBGPRO UD D9G, ADG, AJG, D7G MMGPRO J2X, HHX, MMX EFS, D5S, A5S, AFSPRO J2S, HHS, MMS EFX, D5X, A5X, AFXAAG, A9G, AEG, DDG RetailD6T, ABT, J2T, MMT, HHT E6C, J2C, HHC, MMCFFH, LLH J1U, EEU, BEU, A4UAEU, FEU, F4U, L4U H5U, FFU, LLU, H7UFFC, LLC LLPEEJ, J1J, E4J, K8J, LLJ LLTUltrabay devices ThinkPad R31 Part Product overview Status indicators Color Meaning FRU tests Mouse Interactive Tests FRU removals and replacements Battery assembly ThinkPad R30/R31 HMM Memory cover and Memory card Hard disk drive assembly CD-ROM assembly M2.5 x L10 Black Kgf-cm Backup battery Middle cover LCD assembly M2.5 x L10 Black Kgf-cm M2.5 x L5 Silver Keyboard bezel Pcmcia holder M2 x L6 Silver Kgf-cm Auxiliary Antenna M2.5 x L5 Silver Kgf-cm CPU assembly M2.5 x L53 Silver Kgf-cm Speaker Modem Card without Combo card Hard disk drive bezel CD-ROM chassis M2 x L4 Silver Kgf-cm M2.5 x L5 LCD bezel assembly 13.3″ LCD Inveter 13.3″ LCD assembly on LCD bezel assembly 13.3″ on LCD bracket hinge assembly 13.3″ M2 x L41 Silver Kgf-cm Wireless reassembly Battery pack Mini-PCI Card slot door MT 2656, 2657, 2676 Memory slot door Docking connector ThinkPad R30/R31 HMM Switch Locations Parts list MT 2656, 2657, 2676 ThinkPad R30/R31 HMM CD-ROM Module 27L3436 13.3″ LCD Bezel 46L6330 MT 2656, 2657, 2676 Inch TFT Keyboard Common parts list Brzl KAM, MAM, MLM, KGM KMH, KAA, M1A, KBA2GG, 4CG, LAF, LBF 3CG KDU, 39U, KEU, KFUNHM, NEM MEG, R5X, R7X, TAXR6X, R8X, TBX ThinkPad R31 Part DVD/ CD- RW 16X DVD/ CD-RW Status indicators Color Meaning FRU tests Mouse Interactive Tests Parts list MT 2656, 2657, 2676 Teac Hlds LCD FRU 14.1″ LCD Bezel for W/W 46L6329 Keyboard KBD ASM Swiss Common parts list Description FRU No Telephone cable Spain 27L0450 Recovery CD List KDU, 39U, KEU, KFU 1HJ GAJ, 1PJUltrabay devices Page AMD TrademarksPcmcia
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