Thinkpad L13 Yoga Gen 4 - BIOS request

[Alknik]

Hello,

I have desoldered the 25R256JWEQ and read it with CH341.
Can someone check it?

[hoaca388]

Hello,

I have desoldered the 25R256JWEQ and read it with CH341.
Can someone check it?

L13 Yoga Gen 4 Laptop (ThinkPad) - Type 21FR

[Alknik]

L13 Yoga Gen 4 Laptop (ThinkPad) - Type 21FR

Hi Hoaca338,

I get no charging light and the laptop can not be turned on.

[hoaca388]

Hi Hoaca338,

I get no charging light and the laptop can not be turned on.

Check solder.

[Alknik]

Check solder.

Hi Hoaca388,

I have checked the soldering of 25R256JWEQ and it seems to be ok.

What should I do with W25Q128JNSQ ?
Should I leave the original BIOS inside?
With the original BIOS the pc would not boot and would not charge.
When I used the OF_W25Q128JW1.8V@SOIC8.BIN BIOS from Alegoff, the laptop could charge and it could power on but the ESC,F1, F4 lights were blinking.
Afterwards, I tried to flash other BIOS dumps to the same chip and from that point on, the Laptop could not be charged.
Even if I dump OF_W25Q128JW1.8V@SOIC8.BIN again, there is no charging light.

(Till now I have not desoldered the W25Q128JNSQ since I can read and write to the chip with the SOIC8 clip).

As a reminder, the first time this issue happened was because of a failed BIOS update from Lenovo as described in the first post.
How should I proceed?

[hoaca388]

Hi Hoaca388,

I have checked the soldering of 25R256JWEQ and it seems to be ok.

What should I do with W25Q128JNSQ ?
Should I leave the original BIOS inside?
With the original BIOS the pc would not boot and would not charge.
When I used the OF_W25Q128JW1.8V@SOIC8.BIN BIOS from Alegoff, the laptop could charge and it could power on but the ESC,F1, F4 lights were blinking.
Afterwards, I tried to flash other BIOS dumps to the same chip and from that point on, the Laptop could not be charged.
Even if I dump OF_W25Q128JW1.8V@SOIC8.BIN again, there is no charging light.

(Till now I have not desoldered the W25Q128JNSQ since I can read and write to the chip with the SOIC8 clip).

As a reminder, the first time this issue happened was because of a failed BIOS update from Lenovo as described in the first post.
How should I proceed?

Dump W25Q128JNSQ , post here.

[Alknik]

Dump W25Q128JNSQ , post here.

I have attached the dump of W25Q128JNSQ.

[hoaca388]

I have attached the dump of W25Q128JNSQ.

Try

[Alknik]

Try

Hi Hoaca388,

I still get no charging light and the laptop can not boot.

[hoaca388]

Hi Hoaca388,

I still get no charging light and the laptop can not boot.

Give up