Thanks volinakis! With this BIOS motherboard behaves differently. Reacts on PW_ON and goes on 0.065A, stays 10 seconds on and then turns off. I see under thermal camera PCS is getting a little temp but CPU is staying cold.
In the meantime I've studied more and found program UEFITool NE alpha 67 which is showing different information about ME Region than MEAnalyzer. Using this information I've copied ME from the donor board bios to my BIOS. Now current after powering MB on goes to 0.900A for 3 seconds and powers off... Both PCH and CPU are getting hot.
I've replaced Intel CPU SRKH5 with burned PCH on the LA-L051P with SRKH4 (i7-11370H to i7-11375H) and now I see that this was the easy part.
Now I need to replace ME Region using this from the donor board - 15.0.47.2473 and need help from smarter people than me.
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There were some differences. I've set all the resistors as shown in the photo. After connecting the USB-C power, the power button LED blinks three times. All voltages on the board are okay.
The difference is that my motherboard has an i7 CPU and a graphics card.
So, I'll need to compare all components with the schematic again.
Does anyone have a motherboard from the Lenovo T490 model FT490/FT492/FT590/FT531 NM-B901 and could take a picture of the CPU area, including all the components around it? I would be very grateful.
During the CPU replacement process, I messed up all the resistors and capacitors, and now I can't get it to work again. The motherboard was powering up before, but now it doesn't, even with the newly installed CPU. All voltages are okay, and I don't have any shorts, so I'm assuming I'm missing one of the resistors.
I've also followed the schematic and Broadview,...
I have model T101HA - working one.
Please change S/N 'J1N0CX08U850027' to your own. It's in 6 places in the BIOS.
The only thing I removed is Windows Key which starts from offset 233014 - is now XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
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