02-20-2013 01:58 PM
My X220 recently had the system board replaced at a local Lenovo Authorized Service Provider. They were only supposed to replace the fan but the speaker connector broke when they were removing the board. Windows now isn't able to read the machine type. System Update doesn't work because of this. CPU-Z and hwinfo64 show the machine type as qqqqCTO as if it were blank in the BIOS. Machine type is there correctly in the BIOS correctly, but they left the system board serial number blank. Could that be causing this?
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02-20-2013 02:12 PM
Yes that is definitely the cause. Unfortunately it seems the technician who carried out the repair forgot to enter them. The only solution and method to get the correct values entered in BIOS is through an authorised Lenovo service partner; they will have the necessary tools to fix it.
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02-20-2013 07:03 PM
In case someone else runs into this problem: I fixed the issue by running the BIOS update utility and using the option to change model number. There's a note in it that says to delete what's there and leave it blank to restore it to the factory setting. This did the trick.