Only the light from Mobo Light is activated.
Only the light from Mobo Light is activated.
CPU model is an AMD Ryzen 5 7600x running at 4.7 GHz. Cooler used: Cooler Master Hyper 212 Black Edition 42 CFM. Motherboard: ASRock B850M Steel Legend Wifi (Mini-ATX). RAM installed: 2x 816 GB Lexar Ares DDR5. Storage: Western Digital Blue SN580 500 GB M.2-2280 PCIe 4.0 X4 NVME SSD. GPU: ASUS Geforce 1660 Ti. Power supply: Liteon PS-4601-1 600W (nearly two years old). Case: All I recall is it was an ASUS G10CE. Operating system: Windows 11 Home OEM - DVD 64 Bit. Monitor: Acer KA272, 27.0", 1920 x 1080, 75 Hz.
I previously owned a pre-built PC (ROG Strix G10CE). I replaced many components myself; the only remaining parts from that build are the PSU, GPU, case, and an extra stock fan. Recently, I upgraded to a new motherboard, RAM, cooler (all listed), and installed everything. The issue started immediately after connecting the PSU. Only the RGB lighting on the motherboard came on. I checked troubleshooting steps beforehand but skipped the PSU test because it can't be disconnected due to no switch. The only clue is that the PSU was functioning properly the day before I began replacing the motherboard.
Could you help identify what might be causing this problem?
Verify the front I/O connections (such as power switch, reset switch, etc.) and confirm they are connected properly. Inspect all power cables, ensuring they are securely plugged in. This includes: ATX 24-pin connecting to the motherboard EPS 8-pin at the top-left; an additional 4-pin PCI-E power cable(s) for your video card. Ensure the motherboard is correctly installed and secured within the case. Examine the rear I/O shield and all necessary mounting points. In any case, test the system outside the case, on the motherboard's cardboard box.
I've inspected all the cables and confirmed they were properly fastened. I re-screwed the motherboard in place, double-checking each stand-off alignment. I also used a fresh power supply, but the issue remains unchanged—only the RGB lights on the motherboard activate, with no other changes occurring.
LED refers to the RGB LED located beneath the chipset heatsink. This suggests the board might be receiving standby power, yet it isn’t fully activating. The setup I described involves placing the system on top of the motherboard case, which helps rule out the chassis as an issue. You can then connect the power button pins on the front I/O header to mimic pressing the power button. This approach aims to identify if the problem lies with the motherboard or another component.
I identified the problem—it was the motherboard that failed. The CPU connector pins on the board lacked their black cases or boxes, which prevented the computer from showing any other information. I returned my faulty motherboard and received a replacement, after which my PC started working properly. Thanks for your careful attention to this issue!