1 and most likely check kettle lead to monitor. Then and in order
2. Suspect the monitor
3. Suspect the video card
4. Suspect the motherboard
5 Forget about Windows 11. Most current PCS can't run it as it requires a specific level of hardware security (thus condemning a huge number of perfectly adequate computers to the scrap heap) and it confers no benefit over 10 which is supported until 2025 at least.