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Need guidance regarding T420 CPU upgrade (i5 2410M to i7 2640M)

T400/T410/T420 and T500/T510/T520 Series
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bravo
Posts: 6
Joined: Tue Mar 07, 2023 11:21 am
Location: Spokane, Washington

Need guidance regarding T420 CPU upgrade (i5 2410M to i7 2640M)

#1 Post by bravo » Tue Mar 07, 2023 11:36 am

Good morning,

I have recently attempted to upgrade my ThinkPad T420's i5 2410M CPU to an i7 2410M. Since upgrading, I have been having issues booting in to my OS (Manjaro XFCE.) I unencrypt my hard drive, and then it will get stuck on the Manjaro loading screen. I have attempted to re-install another OS, this time Ubuntu Mate, and it won't boot into the OS; it just goes straight back to boot options. I am looking for any suggestions on what I should do to get this CPU working. I am wondering if I need to upgrade the battery or if the motherboard just isn't compatible with the new CPU. I have heard that I possibly need to update the motherboard bios, but I can only find Windows installers on Lenovo's website, and I don't have a Windows machine in my house.

I know you guys probably need a bit more information about the exact motherboard I have, etc. I will get whatever information you guys request when I get home this evening. I just wanted to get this post out there in case there was something obvious, like the CPU not being compatible with the T420.

Thank you in advance!

Respectfully,
Bravo

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Re: Need guidance regarding T420 CPU upgrade (i5 2410M to i7 2640M)

#2 Post by RealBlackStuff » Tue Mar 07, 2023 12:26 pm

Get the bootable .iso here: https://support.lenovo.com/us/en/downlo ... t420-t420i
Do this with the old CPU, after the update try the new one.
Lovely day for a Guinness! (The Real Black Stuff)
Lenovo: X240, X250, T440p, T480, M900 Tiny.

PS: the old Boardroom website is still available on the Wayback Machine
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bravo
Posts: 6
Joined: Tue Mar 07, 2023 11:21 am
Location: Spokane, Washington

Re: Need guidance regarding T420 CPU upgrade (i5 2410M to i7 2640M)

#3 Post by bravo » Tue Mar 07, 2023 12:49 pm

I will give that a shot, thank you!

bravo
Posts: 6
Joined: Tue Mar 07, 2023 11:21 am
Location: Spokane, Washington

Re: Need guidance regarding T420 CPU upgrade (i5 2410M to i7 2640M)

#4 Post by bravo » Tue Mar 28, 2023 10:18 am

That worked, thank you!

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