When a computer turns on but no display on monitor appears, although the led light is on and fan spinning can be observed, this means the computer may have failed the POST(Power On Self Test). If this happens before a successful POST, one or more of the following will be at fault; Power Supply Unit, Motherboard, Processor, Ram, Graphics Card Unit. CASE: IONX KZ16 PSU: Corsair TX750M CPU: Ryzen 9 3900x MOBO: Asus B450m-k RAM: 16 GB (2 x 8GB RAM) GPU: Palit GTX1080 DRIVE: Sabrent 512GB SSD In this troubleshoot a pc video, HealMyTech teaches you how to eliminate each component one at a time and fix your NO POST issue. However is this happens after a successful POST, i.e no display on monitor, then the issue could be one or more of the following: Video cable, video post, monitor. Watch this troubleshoot video for more details: Computer Turning On But No Display - Pt 8 Troubleshoot A Monitor https://www.youtube.com/watch?v=BvblMsvZsCw Affiliate Product Links: AMD Ryzen 7 3700X (8 Cores up to 4.4GHz, 32MB Cache) UK: https://amzn.to/3vuexHW US: https://amzn.to/3uwcAJs Memory: 16GB Corsair Vengeance LPX 3200MHz (1x16GB) UK: https://amzn.to/3yIfkqx US: https://amzn.to/2RVsobv Hard Drive: Seagate FireCuda 510 SSD 500GB M.2 NVMe & Seagate 1TB BarraCuda UK: https://amzn.to/34nVPFS US: https://amzn.to/3hWriXK GPU: NVIDIA GeForce RTX 3060 Ti 8GB * UK: https://amzn.to/3us8OAP US: https://amzn.to/3ftKR7Y Power Supply: Corsair 650W CV650 UK: https://amzn.to/3c0pUzk US: https://amzn.to/2SEsSTl Motherboard: ASUS PRIME B450M-A II UK: https://amzn.to/3uugkeH US: https://amzn.to/2Tqm6Bh Cooling: Antec A400 RGB Cooler UK: https://amzn.to/2SAYHfU US: https://amzn.to/3yFxo4R Case: Onyx UK: https://amzn.to/34p2uiW US: https://amzn.to/3i0hoo4 Canon EOS 1300D UK: http://amzn.to/2h8SZvw Canon EOS 1300D US: http://amzn.to/2xplQW1 Boya BY M1 Lavalier Microphone UK: http://amzn.to/2xHslo4 Boya BY M1 Lavalier Microphone US: http://amzn.to/2y4Ydze Zoom H1 Recorder UK: http://amzn.to/2w14L0W Zoom H1 Recorder US: http://amzn.to/2xGyqkB Mastech Digital Multimeter MS8268 UK: http://amzn.to/2y5xnXC Mastech Digital Multimeter MS8268 US: http://amzn.to/2xa7ng8 HealMyTech Custom Amazon Affiliate Links: UK Amazon Affiliate link: http://www.amazon.co.uk/?tag=healmytech-21 US Amazon Affiliate link: http://www.amazon.com/?tag=healmytech-20 Subscribe to my channel: HealMyTech null Connect with me: Email: contact@healmytech.com Twitter: @healmytech Instagram: HealMyTech Facebook: https://www.facebook.com/Healmytech-1739142406338235/ Thanks for watching! #nodisplayonmonitor #troubleshootacomputer #computernotturningon