Thinkpad X1 Yoga Gen 3 ,How to know if the BIOS is corrupted

[Loki_Fido]

Hi everyone, hope everyone's having a great day.

I have a Lenovo Thinkpad X1 Yoga Gen 3 for repair. (20LES3T900)
I looked in every corner and the laptop seems fine. Its pulling 500mA but no display, no noise, nothing.

So I assume its a BIOS issue. I downloaded the BIOS with CH341A and opened it on ME Analyser and didn't receive any errors.
Does this mean the BIOS is fine? making it a hardware issue?

I downloaded fresh BIIOS from the Lenovo site and used Hex Editor replace the Lenovo's BIOS into my BIOS region. But the file size ended up being bigger than 16MB. Which is my BIOS capacity.


Question 1
Can anyone tell me how to know if my BIOS file is ok? (BIOS attached)

Question 2
I learned about cutting off the header. But which part is considered header? How much to cut off?

Please help. I will return the favor to this community by at least 2 fold.

Thank you, Thank you, Thank you.

[hoaca388]

Hi everyone, hope everyone's having a great day.

I have a Lenovo Thinkpad X1 Yoga Gen 3 for repair. (20LES3T900)
I looked in every corner and the laptop seems fine. Its pulling 500mA but no display, no noise, nothing.

So I assume its a BIOS issue. I downloaded the BIOS with CH341A and opened it on ME Analyser and didn't receive any errors.
Does this mean the BIOS is fine? making it a hardware issue?

I downloaded fresh BIIOS from the Lenovo site and used Hex Editor replace the Lenovo's BIOS into my BIOS region. But the file size ended up being bigger than 16MB. Which is my BIOS capacity.


Question 1
Can anyone tell me how to know if my BIOS file is ok? (BIOS attached)

Question 2
I learned about cutting off the header. But which part is considered header? How much to cut off?

Please help. I will return the favor to this community by at least 2 fold.

Thank you, Thank you, Thank you.

Serial number ?

[Loki_Fido]

Serial number ?

Hi hoaca388,

S No is R9-0S8TGG 18/11

Just to know, why serial number is necessary?

Thank you bud

[hoaca388]

Hi hoaca388,

S No is R9-0S8TGG 18/11

Just to know, why serial number is necessary?

Thank you bud

It helps determine which bios model to load.

[Loki_Fido]

It helps determine which bios model to load.

Ah. ok ok...
Makes sense.

Thanks

[Loki_Fido]

It helps determine which bios model to load.

Hoaca, any update bud?
Thanks

[hoaca388]

Hoaca, any update bud?
Thanks

X1 Yoga 3rd Gen Laptop (ThinkPad) - Type 20LE

[Loki_Fido]

X1 Yoga 3rd Gen Laptop (ThinkPad) - Type 20LE

Thanks a million hoaca.

Was there any issue in my original bios?

[Loki_Fido]

Hi folks,

Attached BIOS file is from the Lenovo ThinkPad X1 Yoga 3rd.

Giving back to the community,

I love you all.

[peste]

post moved..

[rybskej]

Hi folks,

Attached BIOS file is from the Lenovo ThinkPad X1 Yoga 3rd.

Giving back to the community,

I love you all.

Hi Loki_Fido,

Can you provide details or a picture on where exactly the bios chip was located on the X1 Yoga Gen3 motherboard? For example, iFixit has good pictures of the motherboard (Lenovo ThinkPad X1 Yoga Motherboard Replacement - iFixit Repair Guide), but just like one I'm working on, most of the board is covered with non-conductive shrouds so it's hard to spot the chip without removing all the protective shrouds.

It would be very helpful if you have pictures of your board, or can use one of the iFixit images, and highlight where the bios chip was located. (Similar to this X1 Carbon Gen3 example here: Location of EEPROM on 3rdGen x1 carbon Yoga : r/thinkpad). I've been looking for such an image for hours without finding an exact match for this board.

[hoaca388]

Hi Loki_Fido,

Can you provide details or a picture on where exactly the bios chip was located on the X1 Yoga Gen3 motherboard? For example, iFixit has good pictures of the motherboard (Lenovo ThinkPad X1 Yoga Motherboard Replacement - iFixit Repair Guide), but just like one I'm working on, most of the board is covered with non-conductive shrouds so it's hard to spot the chip without removing all the protective shrouds.

It would be very helpful if you have pictures of your board, or can use one of the iFixit images, and highlight where the bios chip was located. (Similar to this X1 Carbon Gen3 example here: Location of EEPROM on 3rdGen x1 carbon Yoga : r/thinkpad). I've been looking for such an image for hours without finding an exact match for this board.

The bios chip has a length of 16MB, so you should look for the chip with number 128 on the back, Ex: 25Q128JVSQ.

[Loki_Fido]

Hi Loki_Fido,

Can you provide details or a picture on where exactly the bios chip was located on the X1 Yoga Gen3 motherboard? For example, iFixit has good pictures of the motherboard (Lenovo ThinkPad X1 Yoga Motherboard Replacement - iFixit Repair Guide), but just like one I'm working on, most of the board is covered with non-conductive shrouds so it's hard to spot the chip without removing all the protective shrouds.

It would be very helpful if you have pictures of your board, or can use one of the iFixit images, and highlight where the bios chip was located. (Similar to this X1 Carbon Gen3 example here: Location of EEPROM on 3rdGen x1 carbon Yoga : r/thinkpad). I've been looking for such an image for hours without finding an exact match for this board.

Hi rybskej,

Please find attached pic of the whole motherboard and the location of the BIOS chip and its markings.

Picture 1 and 2 are front and the back of the motherboard




Picture 3 is the location of the BIOS chip


Picture 4 is the markings of the BIOS chip


Picture 5 is the markings of the motherboard.



Happy to help.

[kuamii]

I NEED THINKPAD X1 YOGA GEN 3 THUNDERBOLT 3 FIRMWARE FULL 1MB DUMP
ROM CHIP MISSING WHEN MACHINE CAME IN.

[peste]

I NEED THINKPAD X1 YOGA GEN 3 THUNDERBOLT 3 FIRMWARE FULL 1MB DUMP
ROM CHIP MISSING WHEN MACHINE CAME IN.

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

[kuamii]

X1 YOGA 3RD GEN . 20LE-S23B00
MB: LRV3 MB 17800-1
S/N : R9-0VB3G3 19/06
I NEED THUNDERBOLT 3 FIRMWARE FULL 1MB DUMP.
ROM CHIP MISSING WHEN MACHINE CAME IN.

[SMDFlea]

X1 YOGA 3RD GEN . 20LE-S23B00
MB: LRV3 MB 17800-1
S/N : R9-0VB3G3 19/06
I NEED THUNDERBOLT 3 FIRMWARE FULL 1MB DUMP.
ROM CHIP MISSING WHEN MACHINE CAME IN.

here