Thank you very much for the BIOS file.

I have flashed the new BIOS you provided. I also ordered a new 90W power supply, which has arrived, so I am sure it's not a power adapter issue.

Unfortunately, the problem still occurs, but I have noticed some more specific symptoms:

• When I install the RAM: The laptop powers on (LEDs blink, fan spins), but the screen does not turn on at all. It shuts down after a few moments.
• If I try to start it without the RAM installed: The screen does turn on for a moment (LEDs blink, fan spins), shows a "No bootable device" message,

...

Hello everyone,

I need some help with a motherboard swap.

Original Laptop: Lenovo V15-IKB Original (dead) Board: GS44B/GS54B NM-C561 Rev:1.0 Original SN: PF25RNQM (Attached: BIOS dump from this old board - V15_IKB.bin)

New (Donor) Board: GS44D/GS54D NM-C711 Rev:1.0 (This board is from a Lenovo V15-IIL with an i5-1035G1 CPU) (Attached: Current BIOS dump from this new board - V15_IIL.bin)

The Problem: I installed the new NM-C711 board into the V15-IKB chassis. When I connect the original 65W Lenovo PSU, the power LEDs start blinking, the laptop...