Previous working unit ceased functioning after a system change.
Previous working unit ceased functioning after a system change.
Good day. I decided to replace the case on my PC and now it isn’t working properly. All parts seemed fine before in the old case, so I’m unsure what went wrong or what to check. Here are the specifications: Motherboard: Gigabyte B450 DS3H, CPU: Ryzen 5 5600X, GPU: AMD Radeon RX 7800 XT, RAM: 32 GB at 3600 MHz. When I power on through the case’s internal connections, two things occur: the PSU fan spins and the GPU fans spin. The GPU has several red lights that don’t illuminate. The motherboard is very minimal—no lights, speakers, or screens. I’m certain it worked before if other components were fine. The CPU is cooled by AMD’s Prism fan, which makes a noticeable noise when powered on. I connected the fan to a hub that was previously working. The display isn’t an issue right now. Between the motherboard and the case back, I didn’t spot any metal pieces that shouldn’t be there, so it probably isn’t shorted. When I disconnect the CPU power headers and restart, the PSU activates and the GPU fans resume spinning. This seems unusual but might be normal. I’m quite new to this and feel uncertain about where I went wrong. Would anyone have faced a similar problem and willing to guide a beginner?
Inspect every cable. Apart from the main power wire from the PSU to the motherboard, ensure another cable is connected as per your motherboard’s manual. Replace all RAM slots. Around the CPU, expect 3 or 4 EZ Debug indicators. CPU and RAM. VGA may occasionally boot. Any active lights suggest the problem area. If the board includes built-in video/HDMI, take out the GPU, disconnect all extra devices, unplug storage drives, leave only one RAM slot. When the Gigabyte logo appears, you’re halfway done. Launch BIOS, restart and adjust time/date settings. If the logo shows again, you’re close.
I was mistaken about the SATA cable's purpose—it wasn't what it seemed at first. I ended up having to completely dismantle the system. After replacing the CPU fan header with the correct one, the fans started spinning smoothly. It was a clear sign that everything was fixed. I’ll keep this lesson in mind moving forward. Thanks.