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Device & Fault

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Description of Fault

Peripherals

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Technical fault sequence (ASUS FA506)

Power button event received

Embedded Controller (EC) correctly detects PWRBTN#.

Standby rails (+3VALW, +5VALW) enable normally.

Primary power-up sequence completes

CPU and memory rails initialise.

BIOS executes and POST completes.

Internal display initialises and ASUS splash screen appears.

Fan power and control enabled

EC enables the shared fan supply rail.

CPU and GPU fans spin, confirming motor and supply integrity.

Runtime monitoring phase begins

EC starts monitoring:

Fan tachometer feedback

Thermal sensor inputs

PROCHOT / safety lines

Power-good signals from secondary regulators

Invalid EC input detected

Liquid (wine) contamination on EC pins causes:

Leakage between adjacent pins

Corrupted logic-level readings

Erratic or implausible sensor values

Safety condition triggered

EC interprets corrupted inputs as:

Fan failure, or

Thermal fault, or

Invalid power-good state

Controlled shutdown issued

EC commands a full power-off to protect hardware.

System attempts one retry cycle, then shuts down again.

Thermal confirmation

Thermal imaging shows abnormal heating in the EC / control logic area, not CPU or GPU.

Confirms internal leakage or excessive current draw in EC-adjacent circuitry.

Root cause

Liquid ingress (red wine) travelled via the keyboard ribbon directly onto the EC area.

Sugars and acids left a conductive residue under and between EC pins.

This causes persistent logic faults even after drying or surface cleaning.

Repair assessment

Required repair: EC removal, under-chip cleaning, reball or replacement.

High risk, low success rate, and cost exceeds board value.

Classified as beyond economical repair.

Running Comments

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History

has tried drying etc [2026-02-18 15:30] Hello, unfortunatly the chager didnt resolve the problem, the laptop runs for some time under battery if its left on charge but off, the battery does not last for more than 10 minutes though

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