Fix IdeaPad S340 camera flickering

If your IdeaPad S340 camera is flickering, start by comparing lighting conditions and testing the camera in another application. These checks can help distinguish a lighting-related effect from an application problem or a broader camera fault. The supplied information does not establish a model-specific cause or a confirmed fix, so treat each possible cause as a hypothesis.

Identify what is flickering

Notice whether the camera image shows moving bands, changes brightness repeatedly, or cuts to black. Also check whether the whole display flickers or only the camera preview. If the entire display flickers while the camera is closed, investigate a display problem separately; camera troubleshooting alone may not address it.

Check lighting before changing software

Compare the camera preview under daylight with the preview under your usual artificial lighting, switching off the artificial lights for the comparison where practical. Keep other conditions similar. If the flickering disappears or changes substantially, that supports a lighting-related explanation without proving that the camera is faulty.

If your camera software exposes an anti-flicker or power-line frequency setting, select the option appropriate to your local electricity supply and compare the result. Availability of this setting on your particular S340 configuration is not established by the supplied information. If it is absent, continue with the application checks.

Compare applications and restart

• 1. Close applications that could be using the camera, then open a single camera preview and check whether flickering continues.
• 2. Test in another camera-capable application under the same lighting. Flickering confined to one application points toward that application's settings or software, although it does not prove the cause.
• 3. If available, temporarily disable video effects or automatic image adjustments in the affected application. Change one setting at a time and restore it if it does not help.
• 4. Restart the laptop and repeat the comparison. If the symptom returns, note which applications and lighting conditions reproduce it.

Review updates if the problem persists

Check for updates to the affected application and for camera software or drivers offered through Windows Update or Lenovo support for your exact laptop configuration. These are troubleshooting steps, not confirmed fixes for this symptom. If flickering began immediately after a camera driver update, check whether Windows offers a driver rollback before making further changes.

Check speech capture separately

Camera flickering alone does not establish a microphone problem. To check its practical effect on calls, make a short recording in the application you use for conferencing, confirm the selected microphone input, and listen for clear, uninterrupted speech. An input is the microphone source the application records; do not assume it is using the laptop microphone.

If speech remains clear while the picture flickers, continue investigating the video symptom. If the recording also has dropouts, compare audio in another recording application and check its selected input. The supplied evidence does not establish a shared cause for simultaneous camera and microphone problems.

When to seek service or use another camera

Seek technical support if flickering remains reproducible across applications and lighting conditions after a restart and relevant software checks. Provide the exact laptop configuration, operating system, when the symptom started, and the comparisons you tried. Persistent flickering warrants further diagnosis; it does not by itself confirm that the camera needs replacement.

If another camera is available, test it as a temporary way to continue video calls. Confirm the microphone selection again when switching devices. Consider replacement of the built-in camera only after diagnosis identifies a hardware fault or repair is judged impractical.