Proximity & Light sensors broken?

Hi guys, looking for some suggestions.

My Proximity & Light Sensors have stopped working - and not sure what else to try. I have tried the following:

• Flashed CM11S


• Flashed CMOS12 & CMOS12.1


• Flashed Modems individually (for relavent rom) - and tried Oxygen

If I try this app - it tells me there's no sensor available on my phone.

Looking for any other suggestions really. How likely is it that the sensors have just failed?

I've also emailed Oneplus support - but don't hold out much hope for a prompt or useful reply (looking at other peoples experiences!)

Thanks in advance.