BOSE QUIETCOMFORT 45 Wont Turn On
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91%
CONF
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Internal Lithium-Ion Battery
The lithium-ion pouch cell is subject to chemical degradation and cycle-life exhaustion. If the internal resistance increases significantly or the voltage drops below the Under-Voltage Lockout (UVLO) threshold, the protection circuit will prevent the battery from discharging, resulting in a total failure to power the System-on-Chip (SoC).
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VIEW ON AMAZON
#CommissionsEarned
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5%
CONF
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Main Logic Board
The main PCB houses the MCU and the Bluetooth/ANC processor. A failure in the firmware's instruction cycle or a hardware fault in the power-on-reset (POR) circuit prevents the device from transitioning from a 'Deep Sleep' state to an operational state, even when a power source is present.
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VIEW ON AMAZON
#CommissionsEarned
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4%
CONF
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USB-C Charging Port Assembly
Mechanical stress on the USB-C connector can cause microscopic fractures in the surface-mount solder joints. If the charging controller cannot establish a handshake with the power source, the battery will eventually drain to a state of deep discharge, rendering the headphones incapable of turning on.
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DIY Repair Guide
Watch exactly how to replace the Internal Lithium-Ion Battery.