FYI this guide is amazing! Down to providing the length of screws and circling in photos. A++

So, I am a skilled DIYer. I had 1 series x that had no power all the sudden, under warranty, sent back and received a refurb. Then I got a halo infinite edition, it all the sudden wouldn't send video. It would power up but I couldn't boot in safe mode or low res mode. Sent it back, send me a refurb. Now my brothers Xbox did the same thing. It turns on but never boots then shuts off after few minutes. No controller connects either, and can't have the xbox sync with the flash. His is not under warranty so I bought a PSU and replaced, still same thing. Any ideas? Microsoft just sends you a refurb and doesn't tell you what was wrong or else I'd know since it happened to my infinite console.