Unlock SVP Lenovo Thinkpad T14 Gen2
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I already tried to buy a new chip (blank) on aliexpress, I changed it and the board didn't turn on, I only did the test, trying once, has anyone ever managed to make this procedure work?Comment
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Hello, I am asking those who know a way to remove the supervisor/bios password for my laptop
HTB40/HP4B0/HT5B1/HP5B1/HT4B2 NM-D353 Rev:1.0
serial number: PF-3NA82Y
type number: 20W5-S0NH00
Should I do some kind of shorting the chips? In that case which one should i short?
Or should i do some kind of programming?
Thank youComment
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Hello I can confirm that replacing MEC1503 chip with another from a laptop without SVP does work. You can see how I did it in my post here: https://www.badcaps.net/forum/troubl...-and-x13-gen-2Comment
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The MEC has an EEPROM though.
According to this: https://docs.nordicsemi.com/bundle/n...doc/index.html
MEC152x is identical to MEC150x except for an enhanced Boot-ROM SPI loader.
So we can take a look at the MEC152X datasheet: https://ww1.microchip.com/downloads/...S00003427A.pdf
2K byte Internal EEPROM (MEC1523 Only) - Which should be present in the MEC1503 as well
So is the password stored there?
If it's the case, I was wondering if this approach would be a viable option:- Dump the BIOS
- Patch the BIOS to skip password checking popup
- Write the patched BIOS
- Boot and set a new blank password
- Write the original BIOS
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Re: Unlock SVP Lenovo Thinkpad T14 Gen2
I did try with Nm-d351 schematic and boardview to locate jtag, my board was nm-d352, these boards looks identical.
it only read once(rt809f), then stopped reading chip due to low voltage(3v),
the customer took the machine before i can add the 10k resistors for 3v.
you can try it out maybe you can win.
[Mod. Edit] Schematic and boardview -> https://www.badcaps.net/forum/showth...77#post1248377
Reminder: rules and organization of this section
https://www.badcaps.net/forum/showthread.php?t=117483Comment
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