Perform a simple restart. Use a built-in voice recorder to verify if the hardware is picking up sound.
The microphone hole at the bottom of the device is often clogged with lint or dust.
Disclaimer: This guide is for trained technicians. Microsoldering carries a risk of damaging the PCB. Always disconnect the battery before soldering. samsung b350e mic ways
The Samsung B350E utilizes a standard SMD microphone capsule. If the microphone is physically damaged, replace it. If the pads are damaged or there is no continuity, trace the following "ways" (circuit paths).
The problem was that the B350E’s microphone was a known point of failure. The “mic ways”—the hair-thin copper traces on the motherboard connecting the MEMS microphone capsule to the power management IC and the audio codec—were fragile. A single drop, a speck of corrosion, and the voice path died. Perform a simple restart
Use a soft brush or compressed air to clean the small microphone opening at the bottom of the phone.
“It works,” Jun-ho said. “The mic ways are rebuilt. But be gentle with it. The trace is now a jumper wire—stronger than before, but not original.” Disclaimer: This guide is for trained technicians
are widely available from specialized spare parts retailers like Maxbhi.com and Xfurbish.com
He pressed it. “Testing… one, two, three. Mr. Choi’s wife, are you there?”
This paper outlines the diagnostic and repair procedures for microphone failures in the Samsung B350E. Due to the compact nature of the PCB and the external exposure of the microphone port, microphone failure is a common fault. This guide covers microphone replacement, jumper tracing (mic ways), and related component isolation.
“The mic doesn’t work,” Mr. Choi had said, his voice a dry rasp. “I recorded my wife’s voice on it. She passed last winter. The phone worked fine until yesterday. Now… silence.”