alexa on my show 15 doesn't respond to voice commands unless i'm right in front of it yelling, the mics seem dead.

Diagnosis

The Echo Show 15 utilizes a sophisticated 8-microphone array designed for far-field voice recognition. When the device requires you to be inches away or yell, it indicates a failure in the "wake word" detection pipeline. This is rarely a total hardware failure of all eight microphones simultaneously; instead, it is typically a state of "partial deafness" caused by software-level gain suppression, a physical obstruction of the microphone ports, or a glitch in the Digital Signal Processor (DSP) that handles noise cancellation. If the device is wall-mounted, the issue is often exacerbated by "acoustic shadowing." If the display is mounted too close to a textured wall or inside a recessed niche, the sound waves bounce off the wall surface before reaching the mics, creating destructive interference that cancels out your voice. To confirm if this is a hardware or software issue, attempt to trigger Alexa using the on-screen "Tap to Talk" button. If the device responds normally to touch but ignores voice, the issue is isolated to the microphone array or the ambient noise cancellation settings.

How to Fix It

Follow these steps to calibrate the audio input and clear software blocks:

1. Check the Physical Mute State: Locate the microphone off button on the top edge of the frame. If you see a solid red light on the top bezel, the microphones are electronically disconnected. Press the button once to toggle the mute off.
2. Clear the Microphone Ports: The microphones are tiny pinholes located along the top edge of the chassis. Use a can of compressed air or a soft-bristled brush to clear any dust or debris. Even a thin layer of household dust in these ports can significantly reduce the decibel pickup.
3. Perform a Hard Hardware Reset: Do not simply unplug the wall adapter. Unplug the power cable directly from the DC input port on the back of the Echo Show 15. Leave it unplugged for exactly 60 seconds to allow the capacitors on the motherboard to fully discharge, which resets the DSP.
4. Adjust Wake Word Sensitivity: Navigate to Settings > Alexa > Wake Word. If you have multiple wake words enabled, try switching to a single, distinct word like "Alexa." Then, go to Settings > Device Options and ensure there are no active "Do Not Disturb" schedules that might be suppressing the microphone's sensitivity.
5. Update Firmware: Say "Alexa, check for software updates." If the device is on an outdated version, the beamforming algorithms for the 8-mic array may be malfunctioning.

If That Didn't Work

• Test for Acoustic Interference: If the device is mounted using the official wall mount, ensure there is at least a 1-inch gap between the back of the device and the wall. If you have added a third-party decorative frame or "bezel" around the Show 15, remove it immediately. These frames often block the top-edge microphones, forcing you to yell to be heard.
• Factory Reset via Hardware: If the software is corrupted, a standard restart isn't enough. Press and hold the Mute and Volume Down buttons simultaneously for 20 seconds. The screen will go black and then display the Amazon logo, indicating a full factory reset. You will need to sign back into your Amazon account.
• Check for Electrical Noise: If the device is plugged into a cheap power strip or a surge protector with other high-draw appliances, electrical "hum" can bleed into the microphone pre-amps, creating a noise floor that drowns out your voice. Plug the Echo Show 15 directly into a dedicated wall outlet to see if sensitivity improves.
• Disable "Adaptive Lighting" or Third-Party Plugins: In rare cases, certain third-party skills or integrated smart home routines can cause the processor to lag, delaying the "wake" response. Disable any recently added skills to see if the responsiveness returns.

Heads Up

• Avoid Corner Mounting: Never mount the Echo Show 15 in a tight 90-degree corner; the resulting audio reflections cause the microphones to "phase out" your voice, making the device seem deaf.
• Cleaning Warning: Never use liquids, rubbing alcohol, or needles to clean the microphone pinholes. This can permanently rupture the delicate MEMS (Micro-Electro-Mechanical Systems) diaphragms inside the mics.
• Power Stability: Always use the original Amazon power adapter. Using a third-party USB-C power brick with insufficient wattage can lead to unstable voltage to the microphone array, causing intermittent voice recognition failure.