Issue Overview
The Asus ZenBook UX430 is not turning on due to multiple hardware issues. The battery is damaged, and the battery connector is broken. Additionally, the USB port and memory card slot are in poor condition. However, the motherboard is intact, with no major liquid or physical damage.
Table of Contents
Diagnosis and Repair Process
- Initial Inspection
- Checked for physical damage on the circuit board.
- Identified corrosion and missing components near the USB and memory card slots.
- Verified that the motherboard does not have any short circuits.
- Power Circuit Testing
- Measured input voltage (19V) to ensure power delivery.
- Checked inductors and MOSFETs for potential shorts.
- Found a short in the battery charging area, specifically around the MOSFET (E4BU).
- Component Replacement
- Replaced the damaged battery connector.
- Installed a new MOSFET to fix the short circuit.
- Secured all soldered joints and ensured no loose components.
- Power-On Test
- Connected power and confirmed cooling fan operation.
- Checked voltage readings:
- 12V present in charging circuit.
- 1.3V, 1.2V, 3.3V, and 5V present in processor power supply.
- Connected display and confirmed laptop booted successfully.
Conclusion
By replacing the damaged components and resolving the short circuit, the Asus ZenBook UX430 is now functional. The device powers on, and the processor and display work normally. However, the USB port and memory card slot may require further repair or replacement for full functionality.
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