I think soon we will see a simple usb powered circuit that will execute the short in specific time and duration for the glitch to success.
Perhaps a modified programmed device like ACE for XBOX360 will work too.
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In my case i cleared the already virtually cleared password (set to DISABLED even if there was password) 5 times just to be sure, then i cleared Security Chip every time, 5 times total too. Ctrl Alt Del and F1 resulted in unlocked bios )
I suggest you to repeat the procedure, password field perhaps it will show DISABLED, ignore it and proceed with twice ENTER followed by Security chip clear, fingers crossed....Last edited by Andreasbest; 07-23-2024, 10:53 AM.
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Success!!
The mini circuit with button and GND from USB was a miracle, i was ctrl-alt-delete and buttoning rapidly.
Thank you [USER="240937"]Maxpower3[/USER] pro as usual.Maxpower3Success!!
The mini circuit with button and GND from USB was a miracle, i was ctrl-alt-delete and buttoning rapidly.
Thank you [USER="240937"]Maxpower3[/USER] pro as usual....Last edited by Andreasbest; 07-23-2024, 09:03 AM.
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Check RAM, the 3050 has high incompatibility with many dimm models.
Also clean them.
Also check RTC battery, has same issue with 3x 3050 micro and RTC was dead.
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Before display you mean before the LENOVO logo BUT after the backlight?...
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i tried all pins with the above results.
perhaps has something to do with the enabled fingerprint on my BIOS, i don't see other difference.
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I bricked it, loaded defaults on limited BIOS and now is just singing a melody, no post.
No problem, it will become a great donor for the rest T480s, locked motherboard was useless anyway.
If you need any testing with t480s, T490s and E14 Gen2 let me know, i have many.Last edited by Andreasbest; 07-08-2024, 12:55 PM.
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Just to make sure i'm not super dumb, the marked red pins are the correct? any of them?
Please confirm....
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No luck, still the same, closest i can go is a limited BIOS with Main, Config and Date/time tabs only.
Esc is not preventing the shut down due to Thermal Sensing Error...
Last edited by Andreasbest; 07-08-2024, 10:25 AM.
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Ok, gonna try again and upload results.
I'm surprised how easily you made it work on the video.
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2+ hours of testing and no success.
The closest i get is a "user" bios interface with only Main, Config and Time tab enabled.
I get some EAIA data access error and Machine UUID is invalid but still after this asks for password again.
I even installed the same BIOS like Max's laptop on T480s video.
I give up.
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Over 1 hour of testing on T480s and i get Thermal Sensing Error.
Got other errors like EAIA data access error and Machine UUID is invalid but this the most common.
Machine power off when this occurs.
Keep trying.Last edited by Andreasbest; 07-08-2024, 06:17 AM.
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Great work as usual.
So for T480s IF i understand correctly you short any of the LPC_ADx to the GND during post like we did on T420, T430 etc?
Is that correct?
btw i have many T480s and i can do as much test you want in case you need help...
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Update for 3390 owners.
After some months today i reveived a fully working 3390, i tried to trace the source of the problem and i swapped motherboards, in my surprise my mb was working great, so i decided to disassemble screen, then i noticed the LVDS cable on the screen was half way unpluged, probably due to the 360 rotation screen, i firmply plug it and now it's working great.
Then i disassemble the customer's fully working 3390 and the LVDS was there unplugged too but was making contact and still working, i firmly plug it too.
Verdict: LVDS screen cable from...
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