lenovo thinkpad t490 (20N2, 20N3) bios

[Stil86]

Hi everybody,
when I power-on my Lenovo ThinkPad T490 it make's a single bip an a single blink of both power led and charge led and power-off again.
I have read on multiple forum it can be a BIOS problem so I desolder it and I think I have a broken chip BIOS beacuse I try to read it multiple times but the result are always different and the programmer tells me that readed byte are different from aspected.
On a famous site I have seen they sell already programmed BIOS chip but I remember someonr tell's me it is not a good idea to buy it.

So, even if I buy a new blank BIOS chip, how can I find a BIOS to write ?

If it is necessary I can attach a bios dump but is 32MB

Model: T490
Type: 20N3-S8C800
S/N: PF-1BRFVK
Mobo: NM-B901 Rev:1.0
BIOS chip: W25Q256JV

Thanks in advance

Luca

[malage2000]

Hey! I have a Thinkpad T490 20N3 that boots up and I'm able to enter to BIOS but I get this message everytime while posting "Error sending End Of Post message to ME: HECI disabled, proceeding with boot!" and then laptop restarts and the cycle continues... I think that Intel ME got messed up while updating...I leave attached a photo of the message and the backed up BIOS binary flash file in case someone could clean it for me and hoping to revive the laptop! Thank you so much in advance

[volinakis]

Hey! I have a Thinkpad T490 20N3 that boots up and I'm able to enter to BIOS but I get this message everytime while posting "Error sending End Of Post message to ME: HECI disabled, proceeding with boot!" and then laptop restarts and the cycle continues... I think that Intel ME got messed up while updating...I leave attached a photo of the message and the backed up BIOS binary flash file in case someone could clean it for me and hoping to revive the laptop! Thank you so much in advance

follow rules of this forum and post serial no.

[malage2000]

Hey! I have a Thinkpad T490 20N3 that boots up and I'm able to enter to BIOS but I get this message everytime while posting "Error sending End Of Post message to ME: HECI disabled, proceeding with boot!" and then laptop restarts and the cycle continues... I think that Intel ME got messed up while updating...I leave attached a photo of the message and the backed up BIOS binary flash file in case someone could clean it for me and hoping to revive the laptop! Thank you so much in advance

Sorry, I forgot to post serial number, so here are the full details:

Model: T490
Type: 20N3-S7740Q
S/N: PF-22173K
Motherboard: NM-B901 Rev: 1.0

[Stil86]

Hi everybody,
when I power-on my Lenovo ThinkPad T490 it make's a single bip an a single blink of both power led and charge led and power-off again.
I have read on multiple forum it can be a BIOS problem so I desolder it and I think I have a broken chip BIOS beacuse I try to read it multiple times but the result are always different and the programmer tells me that readed byte are different from aspected.
On a famous site I have seen they sell already programmed BIOS chip but I remember someonr tell's me it is not a good idea to buy it.

So, even if I buy a new blank BIOS chip, how can I find a BIOS to write ?

If it is necessary I can attach a bios dump but is 32MB

Model: T490
Type: 20N3-S8C800
S/N: PF-1BRFVK
Mobo: NM-B901 Rev:1.0
BIOS chip: W25Q256JV

Thanks in advance

Luca

Can someone "cook" me a bios for my lenovo ? Or should I try one of the BIOS posted here ?

Thanks