RexMundi

Nope. Powering on with power button. So upon further testing, I once again removed the modchip and tested with stock controller and it doesn't work now! However, the 3rd party controller works without modchip. This stock controller must have just failed. I bought it second-hand on ebay so who knows. I have another one on the way that has been tested so maybe that will solve the problem. Thanks for your help!

this would be a legitimate xbox controller right? This is the one I tried. https://imgur.com/a/Ot5fVzi

Can you confirm if it works with a non-genuine controller? I have both.

Well it’s definitely a genuine controller. I also tried with 3 usb keyboards. Should that work?

I did search first before posting and couldn't find any threads specifically talking about this. I'm sure I'm missing something obvious. I have tested with an original XBOX S Type controller and a 3rd party controller. I have also tested with a USB keyboard and an adapter. None of which work when I enter XeniumOS. However, the controllers work when modchip is disconnected. This is a 1.4 revision XBOX. I assume it must be one of my solder joints to the modchip. I have already reflowed these joints multiple times to fix another issue. Unfortunately, I closed the machine up before I realized the problem. Anyone know which pins I should focus on? Is there a way to test continuity between LPC header pins and the motherboard? Thanks for any help you can provide.

On a 1.4 revision, are there test points I can use to verify continuity between the motherboard and LPC header pins? I tried to find them myself but I have had some difficulty. Just wondering if anyone knew an easier way.