Hardware⏱️ 2 min read📅 2026-05-30

How to Fix Code 43 Error – Multiple Devices Stopped Working After NVIDIA GeForce 940MX Failure (Code 43)

NVIDIA GeForce 940MX failure causes multiple device issues.

Quick Answer: Update or replace the faulty NVIDIA GeForce 940MX graphics card to resolve the issue.

The NVIDIA GeForce 940MX failure, often accompanied by the 'Code 43' error in Device Manager, can be distressing for users who rely on their laptops for work and entertainment. This issue affects not just the GPU but also other components like the PCI Data Acquisition and Signal Processing Controller, PCI Memory Controller, and SM Bus Controller.

Why This Happens

  • Driver issues or conflicts between the GPU and other components can cause this problem.

Best Solutions to Fix It

Method 1: Driver Update and Clean Installation

  1. Step 1: Download the latest NVIDIA GeForce drivers from their official website.

Method 2: System Restore and Reset

  1. Step 1: Enable System Restore on your system and go back to a previous point when the devices were working properly.

Conclusion

By following these steps, you can resolve the 'Code 43' issue and have your devices functioning again. Remember to always keep your drivers updated and perform regular system maintenance to prevent such problems in the future.

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