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L540: need bios chip location (photo) please

L430/L530 and later Series
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glossywhite
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L540: need bios chip location (photo) please

#1 Post by glossywhite » Fri Apr 07, 2023 4:29 am

Hi there. Having trawled Google high and low for three days, I cannot find where the bios chip is located on my ThinkPad L540. I need to remove the whitelist by backing up the bios and patching the file, signing it and re-flashing the clean file.

If anyone could help, I just need the IC location, for the BIOS chip, as I’m not gonna strip it down until I know.

Many thanks folks. God bless you.
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RealBlackStuff
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Re: L540: need bios chip location (photo) please

#2 Post by RealBlackStuff » Fri Apr 07, 2023 5:04 am

Look for a chip marked Macronix MX25L6473E or maybe a Winbond W25Q64xxx
No schematics unless you are willing to pay someone.
Maybe this helps: Lenovo ThinkPad L540 disassembly
Lovely day for a Guinness! (The Real Black Stuff)
But I actually prefer Murphy's from Cork!
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glossywhite
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Re: L540: need bios chip location (photo) please

#3 Post by glossywhite » Fri Apr 07, 2023 3:45 pm

RealBlackStuff wrote: ↑
Fri Apr 07, 2023 5:04 am
 Look for a chip marked Macronix MX25L6473E or maybe a Winbond W25Q64xxx
No schematics unless you are willing to pay someone.
Maybe this helps: Lenovo ThinkPad L540 disassembly
PAY for a photo showing me where a chip is? :lol:

In case anyone else needs the location, here it is: https://photos.app.goo.gl/kWftxfjfvNt29N8PA
Last edited by glossywhite on Sat Apr 08, 2023 12:29 am, edited 1 time in total.
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RealBlackStuff
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Re: L540: need bios chip location (photo) please

#4 Post by RealBlackStuff » Fri Apr 07, 2023 8:42 pm

You need to pay for downloading a schematic.
Picture links are free, and it would be nice if they work (except yours, which does NOT work).
Lovely day for a Guinness! (The Real Black Stuff)
But I actually prefer Murphy's from Cork!
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