Lenovo 3-15ada05 notebook running code but memory, blue screen crash common failing maintenance

Machine model: Lenovo ideapad 3 15ada05nm-c821 rev1.0

This machine has three common failing:
1. The notebook can’t run out of memory.
2. Press crash or blue screen.
3. The laptop can be turned on, but the blue screen crashes after a few minutes or hours of use.
The three common failing are analyzed in turn.
1. The notebook can’t run out of memory.
Maintenance method: Board_Id5 identification resistance replacement on the line, to achieve castration on-board memory.

Lenovo 3-15ada05 notebook running code but memory, blue screen crash common failing maintenance

Lenovo 3-15ada05 notebook running out of memory, blue screen crash common failing maintenance Figure 1

Install 2K resistor at rc123 and remove 10K resistor of rc1606.

Lenovo 3-15ada05 notebook running out of memory, blue screen crash common failing maintenance Figure 2

Why castrate memory?Because the design of this computer is defective, if you replace the memory, even if you use the lead-free solder ball, it will be repaired, unless you play a dead glue around the memory.
2. Press crash or blue screen.

Lenovo 3-15ada05 notebook running out of memory, blue screen crash common failing maintenance Figure 3

As shown in the figure, check whether the black glue covering position on both sides of the memory is open.This machine has similar problems.
Maintenance method: open welding to remove glue add solder and cut off part of plastic on D shell.Otherwise, repair it.
3. The laptop can be turned on, and the blue screen will crash in a few minutes or hours.

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Lenovo 3-15ada05 notebook running out of memory, blue screen crash common failing maintenance Figure 4

This machine high temperature is too high, which causes CPU Crystal to open or the circuit nearby to open. As a result, the laptop works unstable, and the blue screen appears for several minutes or hours.This is the most frequent failure of this machine.
Maintenance method: after Repeat welding Crystal, put a 2mm heat conduction gasket above Crystal to avoid repair.The Crystal is T480, and some old motherboards can be disassembled and replaced with different packages.