Print
login Account
Search
Unsupported Browser Detected: Dear user, the browser you’re currently using is not supported by this website. Please click here for more information about the browsers we support and how to obtain them.

Summary of changes for BIOS update - ThinkCentre M55

version 2JKT49A

  • Fixes the issue where Winphlash tool shows 149 error after resume from S3
  • Updates Winphlash tool

version 2JKT47A

  • Fixes the Recovery fail issue

version 2JKT46A

  • Fixes the problem where Winphlash tool could flash corrupted BIOS
  • Fixes the problem where Flash BIOS with Winphlash tool causes System reboot and blue screen
  • Updates Winphlash tool

version 2JKT45A

  • Fixes the problem of bluescreen after resume from S3

version 2JKT44A

  • Fixes the HDD password issue

version 2JKT43A

  • Updates vbios to 1594

version 2JKT42A

  • Fixes a problem where the unit power switches off when Intel 100S NIC is installed
  • Fixes a problem where a NMI parity causes system BSOD and the system hangs
  • Fixes a Intel AMT command which caused the system hang

version 2JKT41A

  • Fixes a problem where the system hangs when install RAID1 with 2 HDD and a USB HDD
  • Fixes a problem where power on with some kind of memory would cause system hang up and show rubbish

version 2JKT40A

  • Fixes the problem where Esc key becomes abnormal when swiped in the fingerprint reader
  • Fixes the problem where PXE booting hangs after running ABORTPXE.COM
  • Fixes the problem where POST error message ("0232: Extended RAM Failed") randomly appears in system with less than 4G memory
  • Updates BAR code
  • Fixes the problem where system escapes pop after ctrl-alt-del when swiped in the fingerprint reader

version 2JKT39A

  • Fixes the fingerprint keyboard resume workaround

version 2JKT38A

  • Fixes the fatal error at TP DAh with ATI Fire MV 2400 in PEG slot
  • Fixes TP 49h hang with HP 82350A GPIB card
  • Fixes a problem where intermittent hard drive corruption occurs
  • Fixes the S3 resume failure issue of Windows Vista, while entering a S3 check for USB mouse or keyboard randomly.

version 2JKT37A

  • Fixes a problem where the fingerprint reader is not detected
  • Fixes intermittent com port errors in BurnInTest (XP)
  • Reinstates support for certain old USB floppy drives
  • Removes AHCI support from -G/-GF boards even if they have an AHCI-capable ICH SKU
  • Fixes odd behavior on some fingerprint keyboards
  • Fixes a PC-Doctor problem where the keyboard and/or mouse do not work after USB Loopback test
  • Fixes a PC-Doctor problem where the keyboard and/or mouse do not work after many runs of USB Loopback test
  • Updates CPU Microcode

version 2JKT36A

  • Fixes a failure in PC-Doctor with specific Seagate Nighthawk drives
  • Fixes a problem where there is a long delay in POST on some systems when the CD is not attached
  • Adds Setup Summary display of memory Dual/Single channel mode
  • Reports cover tamper in DMI Type 3 structure. On tamper, we will set BootUp Status to WARN; otherwise, SAFE
  • Fixes 0162 error after srcmos armsfdd
  • Fixes a problem where the system fails to boot from Corsair Flash Voyager USB key
  • Fixes a problem where the ATI Fire MV 2400 card has two pci devices
  • Adds the item '/P' in help file ("Readme.1st")

version 2JKT35A

  • Fixes a problem where the system shows an "Adapter ROM Checksum Error" with PEG card

version 2JKT34A

  • Fixes a problem where the system fails to detect large (500GB) hard drives
  • Fixes a problem where the system fails to detect a certain nVidia video card
  • Fixes a problem where the USB devices are not recognized normally after S3 when attached to the front USB port
  • If your system contains a Core 2 Duo processor, Lenovo strongly recommends updating the system BIOS which contains updated CPU microcode files
  • Fixes Energy Star failure

version 2JKT33A

  • Fixes lurking memory corruption on S3 resume
  • Adds support for USB 2.0 split transaction

version 2JKT32B

  • Updates Intel Conroe CPU microcode

version 2JKT32A

  • Fixes a problem where the system fails to update TCG PP (Physical Presence) from operating system (Move TCG PHS call from _SST back to _PTS, CRB was wrong)
  • Fixes "Invalid password in case setting pop with ten keys"
  • Fixes a problem where huge hard drives are not recognized
  • Fixes a problem where GetAssetData fails

version 2JKT31A

  • Fixes a problem where the system has a bad start sequence on first POST after CMOS failure or reset
  • Fixes a problem where the system will not boot to network (Actual symptom: Kill AC + battery, won't boot to network on first POST, only second and subsequent)
  • Fixes a problem where an unsupported system shows the Cover Tamper setting

version 2JKT30A

  • Fixes a problem where a corrupt screen randomly appears at POST screen

version 2JKT29A

  • Fixes a problem where the hard drive LED is always lit on select systems that have no slim optical drive
  • Fixes a problem where the system cannot detect a PCI-E 1x LAN card
  • Fixes a problem where the system shows a yellow mark for PCI-Express ports under windows When 4GB memory is installed

version 2JKT28A

  • Fixes a problem where the system hangs at POST screen after ME is disabled
  • Fixes a problem where a USB key for factory mode setup does not work
  • Fixes a problem where a wake event is always logged as 'unknown'

version 2JKT27A

  • Fixes a problem where the system cannot access ME setup with a fingerprint keyboard
  • Fixes a problem where the system hangs at POST screen after ME is disabled
  • Fixes a problem where a USB key for factory mode setup does not work

version 2JKT26A

  • Enhances Fan Acoustics function in high mode
  • Fixes a problem where 186 and 190 POST errors do not stop POST
  • Fixes a problem where the system hangs at hard drive config screen when install Windows 2000
  • Fixes a problem where the keyboard does not work when install Windows XP with an NVIDIA 7300LE video adapter

version 2JKT25A

  • Fixes a problem where some Setup screens do not match help
  • Fixes boot block recovery from USB CD-ROM
  • Fixes a problem where IGD cannot start in Windows XP with PCIe-x1 card installed
  • Fixes a problem where the system hangs or displays a bluescreen error when insalling Windows Vista with PEG card
  • Fixes a problem where the system hangs after installing ATI X300 driver on Windows 2000 - Fixes an intermittent hang or bluescreen in Windows XP with Ricoh USB printer

version 2JKT24A

  • Updates fan control support for the CPUID 0F49 processors
  • Removes exclamation marks in Device Manager when a PCI video card is installed
  • Ensures that the system can boot the primary boot sequence after a dead battery is replaced
  • Updates SMBIOS processor socket information
  • Adds additional TCG Vista updates
  • Fixes a problem where the system hangs immediately after updating the BIOS to level 23
  • Fixes a problem when the CPUID is limited to 3
  • Prevents corrupting boot block if it is updated after completing the manufacturing process
  • Fixes a highly infrequent problem when a USB device is plugged in to the system, BIOS USB keyboard emulation is enabled, and USB control is being handed off to Windows

version 2JKT23A

  • Various TCG code updates required for Microsoft Windows Vista
  • Updates the Audio Verb Table for Microsoft WindowsVista

version 2JKT22A

  • Corrects a problem setting up the caches on systems with the Intel® Core™2 Duo Processors. It is strongly recommended that systems with this processor update the BIOS to this level.
  • Fixes a problem determining the day of the week when the user sets up a weekly wake-up event through the BIOS Setup program

version 2JKT21A

  • Fixes minor Setup text issues and corrects the LPT mode and hard drive timeout defaults
  • Fixes a problem where the system hangs during boot block recovery from a USB CDROM
  • Ensures the system will boot to the flash diskette if it is in the diskette drive
  • Fixes a problem that occurs during PXE boot from a PCI network card
  • Ensures we do not get a 1762 POST error when a user plugs in or removes a USB Key and a password is installed or the system uses enhanced POST mode
  • Fixes a problem where there is long delay in POST or the system fails to detect the Sony SDX-470V SATA tape drive
  • Fixes a problem where the system hangs at an "EE" checkpoint with certain processors

version 2JKT20A

  • Initial Production Release

  • Alias ID: MIGR-66069
  • Document ID: HT035867
  • Last Updated :6/17/2014
  • (c) 2014 Lenovo