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ThinkPad Computer
Hardware Maintenance Manual 
  
July 2005
This manual supports:
ThinkPad T43
(MT 1871/1872/1873/1874/1875/1876)
ThinkPad  Dock II (MT 2877)
 
                                                                                                                                                                                                                                                                                                                                                  
                    
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                          Note  Before using this information and the product it  supports, be sure to read the general information  under “Notices” on page 213. First Edition (July 2005)  © Copyright Lenovo 2005.  Portions © Copyright International Business Machines  Corporation 2005.  All rights reserved.  U.S. GOVERNMENT USERS – RESTRICTED RIGHTS:  Our products and/or services are provided with  RESTRICTED RIGHTS. Use, duplication or disclosure by  the Government is subject to the GSA ADP Schedule  contract with Len
                    
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                          Contents  About this manual  . . . . . . . . . . .1  Introduction  . . . . . . . . . . . . .3  Important service information . . . . . . . . .3  Strategy for replacing FRUs  . . . . . . . . .3  Strategy for replacing a hard disk drive  . . . . .4  How to use error messages  . . . . . . . .4  Strategy for replacing FRUs for CTO, CMV, and GAV 4  Product definition  . . . . . . . . . . .4  FRU identification for CTO, CMV, and GAV products 5  Important information about replacing RoHS compliant  F
                    
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                          FRU replacement notices  . . . . . . . . .67  Screw notices  . . . . . . . . . . . .67  Retaining serial numbers . . . . . . . . .68  Removing and replacing a FRU . . . . . . . .71  1010 Battery pack (14.1-in. LCD models)  . . . .72  1020 Battery pack (15.0-in. LCD models)  . . . .74  1030 Ultrabay Slim device  . . . . . . . .75  1040 Hard disk drive  . . . . . . . . . .76  1050 DIMM (optional)  . . . . . . . . .78  1060 Keyboard  . . . . . . . . . . .80  1070 DIMM (standard)  . . . . . . . . 
                    
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                          Rear view . . . . . . . . . . . . . 182  Bottom view  . . . . . . . . . . . . 183  Parts list  . . . . . . . . . . . . . . 184  Overall  . . . . . . . . . . . . . 185  14.1-in. LCD FRUs  . . . . . . . . . . 194  15.0-in. LCD FRUs  . . . . . . . . . . 196  Keyboard  . . . . . . . . . . . . . 199  Recovery CDs  . . . . . . . . . . . 203  Miscellaneous parts . . . . . . . . . . 205  AC adapters  . . . . . . . . . . . . 208  Optional FRUs  . . . . . . . . . . . 209  Common parts list  . . . . . . 
                    
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                        vi MT 1871/1872/1873/1874/1875/1876                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
                    
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                            About this manual  This manual contains service and reference information for  ®  ThinkPad T43 series (MT 1871, 1872, 1873, 1874, 1875,  and 1876), and ThinkPad Dock II (MT 2877) products. Use  this manual along with the advanced diagnostic tests to  troubleshoot problems.  The manual is divided into sections as follows:  v   The common sections provide general information,  guidelines, and safety information required in servicing  computers.  v   The product-specific section includes servic
                    
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                        2 MT 1871/1872/1873/1874/1875/1876                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
                    
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                             Introduction  Important service information  Important  BIOS and device driver fixes are  customer-installable. The BIOS and device drivers  are posted on the customer support site  http://www.lenovo.com/think/ support  Advise customers to contact the Customer Support  Center at 800-426-7378 if they need assistance in  obtaining or installing any diskette fixes.  Customers in Canada should call the Customer  Support Center at 800-565-3344 for assistance or  download information.  Strategy f
                    
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                        Important service information  Strategy for replacing a hard disk drive  Always try to run a low-level format before replacing a hard  disk drive.    Attention:  The drive startup sequence in the computer  you are servicing may have been changed. Be extremely  careful during write operations such as copying, saving, or  formatting. If you select an incorrect drive, data or  programs can be overwritten.  How to use error messages  Use the error codes displayed on the screen to diagnose  failures.
                    
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                         Important service information v   The HMM will have the 4-digit MT and 3-digit CTO  model only (Example: 1829-CTO). Again, CMVs are  custom models and are not found in the HMM. General Announce Variant (GAV) This is a standard model (fixed configuration). GAVs are  announced and offered to all customers. The MTM portion  of the machine label is a 4-digit MT and 3-digit model,  where model = a “fixed part number”, not “CTO” (Example:  1829-F1U). Also, PEW, eSupport, and the HMM will list  these 
                    
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                        Important service information  v   eSupport can be used to view the list of key  commodities built in a particular machine serial (this is  the same record found in PEW).  v   eSupport can be accessed at the following Web site:  http://www.lenovo.com/think/ support  v   To view the key commodities, click on PARTS  INFORMATION, then PARTS LOOKUP. Type in the  model type and serial number. The key commodities will  be returned in the eSupport record under PARTS  SHIPPED WITH YOUR SYSTEM.  For the 
                    
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                         Important service information Important information about replacing  RoHS compliant FRUs  RoHS, The Restriction of Hazardous Substances in  Electrical and Electronic Equipment Directive  (2002/95/EC) is a European Union legal requirement  affecting the global electronics industry. RoHS  requirements must be implemented on Lenovo  products placed on the market after June 2006.  Products on the market before June 2006 are not  required to have RoHS compliant parts. So, if the  original FRU parts 
                    
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                        Important service information  Products marketed before Products marketed after June  June 2006 2006  Current or Replacement Current or Replacement  original part FRU original part FRU  Non-RoHS Can be Must be RoHS Must be RoHS  Non-RoHS  Non-RoHS Can be RoHS  Non-RoHS Can sub to  RoHS  RoHS Must be RoHS    Note:  A direct substitution is a part with a different FRU  part number that is automatically shipped by the  distribution center at the time of the order.  Related web URLs are:  v   IBM In
                    
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                         Safety notices Safety notice 1       Before the computer is powered on after FRU  replacement, make sure all screws, springs, and other  small parts are in place and are not left loose inside  the computer. Verify this by shaking the computer and  listening for rattling sounds. Metallic parts or metal  flakes can cause electrical shorts.  Avant de remettre l’ordinateur sous tension après  remplacement d’une unité en clientèle, vérifiez que  tous les ressorts, vis et autres pièces sont bien en  
                    
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                        Safety notices  Safety notice 2     DANGER       Some standby batteries contain a small amount of  nickel and cadmium. Do not disassemble a standby  battery, recharge it, throw it into fire or water, or  short-circuit it. Dispose of the battery as required  by local ordinances or regulations. Use only the  battery in the appropriate parts listing. Use of an  incorrect battery can result in ignition or explosion  of the battery.  Certaines batteries de secours contiennent du  nickel et du cadmium
                    
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                         Safety notices (continuation of safety notice 2)     Alcune batterie di riserva contengono una piccola  quantità di nichel e cadmio. Non smontarle,  ricaricarle, gettarle nel fuoco o nell’acqua né  cortocircuitarle. Smaltirle secondo la normativa in  vigore (DPR 915/82, successive disposizioni e  disposizioni locali). Quando si sostituisce la  batteria dell’RTC (real time clock) o la batteria di  supporto, utilizzare soltanto i tipi inseriti  nell’appropriato Catalogo parti. L’impiego di una  b
                    
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                        Safety notices  Safety notice 3     DANGER       The battery pack contains small amounts of nickel.  Do not disassemble it, throw it into fire or water, or  short-circuit it. Dispose of the battery pack as  required by local ordinances or regulations. Use  only the battery in the appropriate parts listing  when replacing the battery pack. Use of an  incorrect battery can result in ignition or explosion  of the battery.  La batterie contient du nickel. Ne la démontez pas,  ne l’exposez ni au feu 
                    
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                         Safety notices (continuation of safety notice 3)  La batteria contiene piccole quantità di nichel. Non  smontarla, gettarla nel fuoco o nell’acqua né  cortocircuitarla. Smaltirla secondo la normativa in  vigore (DPR 915/82, successive disposizioni e  disposizioni locali). Quando si sostituisce la  batteria, utilizzare soltanto i tipi inseriti  nell’appropriato Catalogo parti. L’impiego di una  batteria non adatta potrebbe determinare l’incendio  o l’esplosione della batteria stessa.  Las baterí
                    
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                        Safety notices  Safety notice 4     DANGER       The lithium battery can cause a fire, an explosion,  or a severe burn. Do not recharge it, remove its  polarized connector, disassemble it, heat it above  100°C (212°F), incinerate it, or expose its cell  contents to water. Dispose of the battery as  required by local ordinances or regulations. Use  only the battery in the appropriate parts listing. Use  of an incorrect battery can result in ignition or  explosion of the battery.  La pile de sauve