HP Pavilion 15 schematic drawn on Quanta board U83, revision 1A, in PDF form at 2.46 MB. Quanta uses short alphanumeric project codes like U83, printed on the motherboard along with the revision, and HP sold the Pavilion 15 on several such boards. Verify the marking before following any value. Repair work it supports includes tracing the always-on and main rails, finding the EC and BIOS flash circuitry, and locating test points. It also supports checking the charger section when a unit fails to power on.
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