: Sites like AliSaler often provide BIOS dumps and related schematic previews for this model.
A novice might look at a schematic and see a mess of lines and acronyms. Here is the breakdown of what you will find inside the LA-G851P PDF. la-g851p schematic
Measure the gate pins of these MOSFETs. If the gate voltage is not around 25V (for N-channel high-side switching), the charging IC is intentionally keeping them turned off due to a detected downstream short circuit. : Sites like AliSaler often provide BIOS dumps
This is the most referenced section. The LA-G851P uses a complex multi-stage power delivery network (PDN). Key regulators include: la-g851p schematic