Hello, as requested I shorted DDR4_B_DRAMRST_R_N to +1.2V on the board. When powered on, I can confirm that DDR4_B_DRAMRST_R_N reads +1.2V, but the system still only blinks and the fan spins briefly before shutting off.

Is there any possible way to recover my laptop, which now relies solely on external RAM since the internal RAM has been removed?
  1. Do we need to change the Lenovo Board ID (0–9)?
  2. Can modifying the BIOS SPD bring the laptop back to life?
  3. Do we have schematic for NM-E351?
Board : IdeaPad 3 17ABA7 NM-E351
For context: After a Windows update, my laptop stopped...