Xbox2001

I’ve recently installed an Aladdin mod chip in my original Xbox after it stopped showing a video output. I am assuming that it was the original tsop chip that had died on the motherboard and therefore installing a mod chip would be able to successfully bypass it. However after installing the mod chip it won’t get past the initial boot screen. It just loses video output and then comes up with error 21. (It also doesn’t always boot successfully after pressing the power button, sometimes there is just no video output) Pretty sure it’s a version 1.4-1.5 For the Aladdin install I’ve soldered d0 to ground and bt on the chip to ground on the chip. Does anyone have any suggestions to get it working?

I have an original Xbox I acquired recently, it worked fine for the first day but then it stopped showing up on the tv. I tried turning it on and off a few times and got it to show on tv but then it started flashing red/green and came up with error 21 on screen. I have since tried to power on the Xbox and now cannot get it to show anything on tv and it not longer flashes red/green (just solid green from when it’s powered on). I think it’s a 1.4 model, original Xbox no mod, have also removed clock cap and can’t see any visible damage to other components. Any help would be much appreciated