Re: bricked lenovo t480s - need help!
I got it to work. I successfully disabled the Intel Management Engine.
I want to share my findings just in case anyone runs into the same issues as me.
Originally I ran me_cleaner.py like this:
The original bios firmware has 13 partitions. This removes too many partitions and will brick it.
Based on [URL="https://puri.sm/posts/deep-dive-into-intel-me-disablement/"]this blog post from Purism[/URL], they recommend to set the HAP bit, but also whitelist the MFS partition...
Announcement
Collapse
No announcement yet.
User Profile
Collapse
-
Re: bricked lenovo t480s - need help!
it's not something want to do:...
Leave a comment:
-
Re: bricked lenovo t480s - need help!
if you bridge it, it shorts SRTCRST to GND..guess you think you're pretty funny huh...Last edited by monological; 09-22-2023, 11:20 AM.
Leave a comment:
-
Re: bricked lenovo t480s - need help!
I [B][I][U]don't want[/U][/I][/B] the Intel Management Engine to be enabled? Got it?
That's the whole point of why I'm re-flashing the BIOS in the first place.
I guess you like having your machine backdoor-ed.Re: bricked lenovo t480s - need help!
I [B][I][U]don't want[/U][/I][/B] the Intel Management Engine to be enabled? Got it?
That's the whole point of why I'm re-flashing the BIOS in the first place.
I guess you like having your machine...Last edited by monological; 09-22-2023, 11:13 AM.
Leave a comment:
-
Re: bricked lenovo t480s - need help!
Let me teach you something since you don't seem to understand how to neutralize the ME:
from [url]https://github.com/corna/me_cleaner/wiki/HAP-AltMeDisable-bit[/url]Re: bricked lenovo t480s - need help...able-bit[/url]...
Leave a comment:
-
Re: bricked lenovo t480s - need help!
"want to break another laptop"...what the hell are you talking about?
For your information, when I dumped the bios, it did it twice, diffed the binaries and they matched. Pretty sure that is sufficient to convince anyone that it is a valid dump.
I'm pretty sure I said the wire was temporary so I can verify that the flash chip was working correctly. Do you understand English my guy?
Look at the images. The firmware you linked to doesn't have the HAP bit set, but the modified firmware that I...Last edited by monological; 09-22-2023, 10:56 AM.
Leave a comment:
-
Re: bricked lenovo t480s - need help!
I flashed the firmware you linked to and it posts now.
The firmware however doesn't have the ME cleaned so I ran me_cleaner on it, re-flashed it, verified it twice but now I get musical tones error 0001
Leave a comment:
-
Re: bricked lenovo t480s - need help!
Thanks for the tip! I checked the diode and and it was damaged.
I temporarily replaced it with a copper wire and vcc now shows ~3.4v.
I used an oscilloscope to probe DO and I can verify it's getting read out!
The keyboard lights up now and the power button blinks 3 times, but it's still not booting.
I tried re-flashing the original firmware dump and it still just blinks 3 times.
Any ideas what I should try next?...
Leave a comment:
-
Re: bricked lenovo t480s - need help!
I figured out the vcc on the bios chip is 1.6v because of the voltage drop across the diode.
3.3v ---> diode ---> 1.6v @ vcc
Guess this is normal then?
If you have a corrupt bios firmware, what usually happens? Does it play the musical diagnostic tones?
Leave a comment:
-
-
bricked lenovo t480s - need help!
I'm trying to remove the Intel ME from the bios firmware. I have a black CH341A that I modded to correctly drive 3.3v to the chip instead of the default 5.0v. I was able to connect the soic-8 alligator clips to the W25Q128JV (U49) and successfully dump the bios, run me_cleaner, re-flash the bios with the updated firmware. However, now it seems that I bricked it completely. I press the power button and nothing happens. Blank screen. The power button does not blink 3 times, it does not play musical sounds, nothing. I then re-flashed the original firmware, and same thing. I checked the voltage on...
No activity results to display
Show More
Leave a comment: