![]() ![]() After a great deal of frustration and time, I was finally able to obtain a replacement motherboard from Lenovo. ↳ ThinkPad X20/X30/X40 Series incl.Does anybody know how to set the new Machine Type and Serial Number after a motherboard replacement for an H535? The motherboard recently failed on my H535 (outside of the Lenovo warranty but still under my credit card's extended warranty).↳ ThinkPad SL and L Series until L420/L520.↳ Forum Notices, Questions and Suggestions.FORUM RULES, HOW-TOs and FREQUENTLY ASKED QUESTIONS. ![]() Unfortunately, the error messages I get still suggests that the EEPROM is still write protected. A "DIR/W" command reveals a bunch of files with the two most interesting for my purposes are "SERUPDT.EXE" and "SERUPDT2.EXE", both of which have reasonably clear instructions for updating system EEPROM data. However, the "COMMAND.COM" supplied with HMD is only 9kb, while the "COMMAND.COM" supplied with Rufus is 90kb? If I copy over Rufus' COMMAND.COM the AUTOEXEC.BAT fix "works" but it boots to a C:\ prompt. Howeever, when I do, it boots straight into the utility. ![]() I have to manually enter the path to "COMMAND.COM" which is right in the root directory and shouldn't be necessary. That's usually a problem with the MS-DOS "PATH" command in "AUTOEXEC.BAT", but "fixing it" has no effect. If you make it with Rufus it's bootable but when it boots, it can't find "". Geez! Here I thought that replacing the mobo was going to be the hard part! Do you hit "esc" one time or multiple times or do you hold it down continously? The following is going to really date me: As you probably know, making a bootable usb with the utility provided with the HMD doesn't work it isn't bootable. ![]()
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