The Dell Precision M6400 Service Manual provides information on how to troubleshoot and disassemble the computer. It also provides information on the component base, hard disk drive, optical drive, WLAN/WiMax card, WWAN card, UWB WPAN card and WPAN card with Bluetooth® wireless technology, memory, coin cell battery, LED shroud, keyboard, full-screen display LED and CCFL display, palmrest assembly, fan, processor heat sink assembly, video card/heat sink assembly, processor module, card retention bracket, IEEE 1394 card, left I/O board, right I/O board, system board, flashing the BIOS, and the Biometer cable.