Lenovo T480S

[Foorsee]

post S/N, full name and model, motherboard model, TYPE,etc.

Uefi Bios version - N22ET85W (1.62)
embedded controller version - N22HT38 (1.23)
ME FIRMWARE - 11.8.96.4657
Machine type model - 20L8S3X10F
SYSTEM UNIT SN - PC1149Y2
SYSTEM BOARD SN - L1HF8CT056X
MAC - E8 6A 54 8D 10 5F
ET481 NS-B471 Rev:1.0

Anything else?

[peste]

post S/N, full name and model, motherboard model, TYPE,etc.

[peste]

post merged..next time look for a thread with the name and model, motherboard model of the laptop, and post there, if you can't find it, then make a new thread..

[Foorsee]

Hi everyone. I tried to patch my bios. But it wont work, even with a stock one i dumped...
Doesn't power on, power led blinks if i plug charger.
Need help ASAP!!

Here is my stock bios:

[SMDFlea]

Thread merged..next time please look for a thread with the name and model, motherboard model of the laptop, and post there, if you can't find it, then make a new thread.

[DNAGSM]

Model	Lenovo ThinkPad T480s
S/N	LVSE146547
Board ID	ET481 NM-B471 REV:1.0 2017 10 30

When you press the power key, the processor fan starts a gentle cycle and then stops
Is it possible to modify the Dump Bios to address the problem of it not booting?

[Dreno]

Hi... I have lenovo t480s that power on and off
Can someone post only EC bios please?

Motherboard: ET481 NM-B471
Rev 1.0 2017-10-30
SN: PC-0XLLFC

[rayrayrayraycat]

If anyone thinks I *haven't* fried the diode (or something worse) I would be happy to try again.

Update: I've replaced the diode @ D4 and I'm back in business on my stock BIOS image. The only problem with the image is that I had some extra bytes at the end of it that needed trimming back to the 16777216 byte size. I'm on my third diode now trying different Libreboot builds that wouldn't start. The diode fried with two different programmers: a pi Pico flashprog one and a TL866ii-plus. I'm going to stop tempting fate for now. This is the diode: https://www.digikey.com/en/products/...-30T2R/5955710

[rayrayrayraycat]

I have tried multiple Libreboot builds, my original BIOS backup, and the one linked above. With all of them I get the same symptom. The charge light comes on, power button/keyboard light up for 1 second and then go dark. I suspect I've run into the same issue described by monological in this thread --https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/108386-bricked-lenovo-t480s-need-help -- but I lack the hardware to confirm by testing the diode. I originally programmed with a GQ 4x4 programmer that may have overvolted the chip and I've since built a Pico based programmer as recommended by the Libreboot docs.

One additional detail to the symptom: when I plug in the power supply and see the lights go off after 1 second, I also observe the CPU fan spinning up and stopping every few seconds, almost like it's trying to boot up and failing. If I press the power button the fan stops. If anyone thinks I *haven't* fried the diode (or something worse) I would be happy to try again.

[rayrayrayraycat]

try that bios https://www.badcaps.net/forum/troubl...53#post3662653

Just flashed that BIOS. The laptop charge light, keyboard, and power button light up for about 1 second after plugging in power and then go dark. The power button isn't doing anything. Tried the reset button with no change. Am I cooked?

[SMDFlea]

I have a T480s with an i7-8650u. I attempted to install Libreboot but ended up unable to boot the system. I also re-flashed my original BIOS backup but I think it's corrupt as the system still will not boot. Can someone help analyze my OEM BIOS backup?

Type: 20L8-S7NQ03
Motherboard: ET481 NM-B471
Rev 1.0 2017-10-30
Serial Number: PC0Y7QFU

try that bios https://www.badcaps.net/forum/troubl...53#post3662653

[rayrayrayraycat]

I have a T480s with an i7-8650u. I attempted to install Libreboot but ended up unable to boot the system. I also re-flashed my original BIOS backup but I think it's corrupt as the system still will not boot. Can someone help analyze my OEM BIOS backup?

Type: 20L8-S7NQ03
Motherboard: ET481 NM-B471
Rev 1.0 2017-10-30
Serial Number: PC0Y7QFU

[Dzony83]

hi try

It works perfectly.

Thank you very much!

I also tried the file from Maxpower3, and that BIOS works perfectly too. Thanks, Max!

To SMDFlea... My mistake. It won't happen again. I tried to delete the second post as soon as I put it up, but I couldn't. My apologies once again!

[SMDFlea]

posts moved to t480s topic.

[SMDFlea]

I have a Lenovo T480s that doesn't have an administrator password but has Autopilot. Is it possible to remove Autopilot?

Laptop: Lenovo T480s
Board: L1HF86M0033
SN: PC0W3XT8

Thank you!

Read the rules and don`t post the same request in more than one thread in future please........ https://www.badcaps.net/forum/troubl...before-posting

[Maxpower3]

I have a Lenovo T480s that doesn't have an administrator password but has Autopilot. Is it possible to remove Autopilot?

Laptop: Lenovo T480s
Board: L1HF86M0033
SN: PC0W3XT8

Thank you!

here

[shiyab]

I have a Lenovo T480s that doesn't have an administrator password but has Autopilot. Is it possible to remove Autopilot?

Laptop: Lenovo T480s
Board: L1HF86M0033
SN: PC0W3XT8

Thank you!

hi try

[Dzony83]

I have a Lenovo T480s that doesn't have an administrator password but has Autopilot. Is it possible to remove Autopilot?

Laptop: Lenovo T480s
Board: L1HF86M0033
SN: PC0W3XT8

Thank you!

[hoaca388]

I have a lenovo T480s, When turning the Laptop on, it plays a beep melody.
Board: ET481 NM-B471 rev 1.0
Laptop: Lenovo T480s
Type: 20L8-CT01WW
SN: PC-0VVS91 18/06
Could someone help me getting my dump cleaned?
Thank you!

T480s Laptop (ThinkPad) - Type 20L8

[shiyab]

I have a lenovo T480s, When turning the Laptop on, it plays a beep melody.
Board: ET481 NM-B471 rev 1.0
Laptop: Lenovo T480s
Type: 20L8-CT01WW
SN: PC-0VVS91 18/06
Could someone help me getting my dump cleaned?
Thank you!

hi try