Скачать или смотреть I Almost Called a Dead CPU on This HP Laptop... I Was Wrong.

This HP 15s repair was a total rollercoaster. It had all the classic symptoms of a "brain-dead" motherboard: a broken RAM slot, a BIOS that seemingly wouldn't talk, and a flat 600 mA current draw that looked like a catastrophic hardware failure.

In this video, I walk through the full diagnostic process:

Microsoldering: Repairing a physically desoldered RAM slot.
Deep Diagnostics: Using an oscilloscope to monitor the BIOS Chip Select (CS) pin to verify PCH/CPU health.
The BIOS Trap: Attempting multiple BIOS flashes with a CH341A programmer.

The Breakthrough: Discovering the specific power sequencing quirk of these 10th Gen HP boards—why they sometimes REFUSE to fully initialize without a battery connected.

Don't let a steady current draw fool you! This was a great lesson in checking the basics (and the battery) before declaring a motherboard "beyond economical repair."

Tools used in this video:

Oscilloscope (checking PCH activity)
CH341A Programmer
Lab Bench Power Supply
Microscope & Soldering Station