Basilisk V3 Pro Sensor Not Illuminating | Razer Insider
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Basilisk V3 Pro Sensor Not Illuminating

  • May 12, 2026
  • 1 reply
  • 11 views
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I have a Basilisk V3 Pro that just passed out of warranty a couple months ago and today decided to stop working. 

It enumerates in Windows and registers in Synapse. It can click and scroll just fine, but the sensor isn’t lighting up. I ran a firmware update, but that didn’t resolve the issue either. 

I happen to have a second one in the house, so I tried something weird. With the second mouse turned on but not connected to the PC, I held its sensor up to the broken one and got pointer motion. So the entire problem is JUST the IR light source for the sensor.

This feels repairable on its face, but before I open this mouse up, does anyone have tips here? I’m comfortable with soldering, but I doubt I can do surface mount work.

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1 Reply

Razer.Aero
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  • Razer.AeroRazer Support
  • Razer Support
  • May 13, 2026

Hello greatBrightMaroon419,

Thanks for the detailed explanation and I’m sorry to hear about the issue with your Razer Basilisk V3 Pro. Since the mouse is still being detected and the clicks and scroll are working, it does seem like the issue may be limited to the sensor light source or related hardware. To further isolate the problem, please try the following steps below:

1. Test it on another PC if you have not done so already.
2. Check whether the issue happens in both wired and wireless mode.
3. Close Synapse completely and test the mouse again.
4. Confirm that the firmware is fully updated.

Please also note that we do not recommend opening or repairing the mouse yourself, as this could lead to further damage. Take care for now!

 

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