Removing and replacing a FRU

1200 System board, interposer card, and base cover

For access, remove these FRUs, in order:

v“1010 Battery pack” on page 68

v“1020 Ultrabay Enhanced device” on page 69

v“1030 Hard disk drive” on page 70

v“1040 DIMM (optional)” on page 72

v“1050 Keyboard” on page 73

v“1060 DIMM (standard)” on page 77

v“1070 Modem daughter card (MDC/MDC-2)” on page 78

v“1080 Bluetooth/Modem daughter card (BMDC/BMDC-2)” on page 80

v“1090 Keyboard bezel” on page 82

v“1100 Mini PCI adapter” on page 86

v“1110 Fan assembly” on page 90

v“1120 CPU” on page 91

v“1130 Backup battery” on page 92

v“1140 Speaker assembly” on page 93

v“1150 IEEE 1394 cable” on page 95

v“1160 PC Card slots assembly” on page 98

v“1170 Ultrabay Enhanced shield kit” on page 100

v“1180 LCD assembly” on page 107

v“1190 VGA and Ultrabay Enhanced device eject button cable” on page 111

Important notice for handling the system board:

In ThinkPad R50 series, the security chip is soldered on the underside of the system board in some models as in this figure.

(continued)

114R50/R50p, R51 Series

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IBM R50 Series, R50p Series System board, interposer card, and base cover, Important notice for handling the system board

R51 Series, R50 Series, R50p Series specifications

The IBM R50p Series, R50 Series, and R51 Series represent a notable lineage of ThinkPad laptops that were well-received for their robust features and business-friendly characteristics. Launched in the early 2000s, these laptops catered primarily to professionals and enterprises, offering a blend of performance, durability, and a suite of technologies that made them stand out in the market.

The R50p Series was particularly notable for its focus on high-performance computing. It featured powerful Intel processors, such as the Pentium M, and supported ample RAM capacity, which enhanced multitasking capabilities. This series was also equipped with dedicated graphics options, such as the ATI Mobility Radeon, making it suitable for tasks requiring graphic processing, including CAD applications.

The R50 Series continued this trend, balancing performance with affordability. It boasted a lightweight design, making it easier for professionals on the move. The R50 series introduced several connectivity options, including USB 2.0 ports, Ethernet, and optional Wi-Fi, allowing for seamless networking in office environments. The inclusion of a keyboard with a TrackPoint enabled users to navigate efficiently, a hallmark of the ThinkPad design philosophy.

The R51 Series took things a step further by enhancing performance and user experience. It offered improved battery life, which was a significant consideration for mobile professionals. The robust build quality, often referred to as "business rugged," ensured that these laptops could withstand the rigors of daily use. The R51 also featured an upgraded display for better visuals, contributing to more comfortable working conditions, especially for long hours.

In terms of security, these series employed various features like a fingerprint reader and an integrated Trusted Platform Module (TPM) for enhanced data protection. IBM's commitment to security and reliability was evident in these models, making them a preferred choice among enterprises.

Overall, the IBM R50p, R50, and R51 Series ThinkPads combined high-performance hardware with a range of features tailored to meet the needs of business users. Their durability, battery life, and emphasis on security made them lasting favorites for those seeking a dependable laptop for professional use. Even years after their release, these models are often regarded as symbols of IBM's legacy in the computing industry.