CPU, VGA and boot indicators working alongside a non-display setup (AM4)
CPU, VGA and boot indicators working alongside a non-display setup (AM4)
Acquired some refurbished components for a project and haven’t managed to start the system. The EZ debug LEDs are functioning, but I’m puzzled by the issue. I’ve gone through the No Post thread checklist without finding any faults. Once I power on, fans activate, then the CPU debug LED appears briefly (about 4 seconds), shuts off after a few seconds, followed by the VGA LED for a couple of seconds, then it turns off and the BOOT LED stays lit until power is cut. After that, the CPU LED lights up quickly before the system fully powers down. I see black video output unless I reboot the power supply unit, at which point I can access the BIOS and confirm my 5600x is properly recognized.
System specs: 5600x M SI B450m Mortar Max (BIOS version supporting 5000-series), Corsair LPX 16GB x2 @3200MHz, EVO 850 250GB SSD, 1TB Caviar Blue HDD. The EVO 850 and HDD are the only components from my previous Intel build, installed alongside a Windows 10 setup.
What I’ve tried:
- The CPU had bent pins; after straightening, everything aligns correctly and the CPU sits flush.
- Tested GPU on another machine – it works fine.
- Re-seated RAM and double-checked all connections.
- Verified SSD isn’t dead by connecting it to my laptop via SATA/USB adapter.
Problems observed:
1. Video appears only after power cycling the PSU.
2. Booting from the SSD still fails despite video output.
I’m at a loss for solutions and would really appreciate any guidance. It’s been a while since I’ve visited this forum, but it’s the best chance I have to get help.
Refer to mobo manual dimm 2 and 4 for initial steps. Removing 4 worked similarly. Placing them in dimm 1 and 3 triggered a message: "You put your rams in the wrong slots, put them in 2&4." Also, after booting, the motherboard reported an overheating alert on the CPU "1.5 seconds," despite having plenty of thermal paste, well-sealed screws, and four fans actively cooling it. What’s happening?
The main clue points to the motherboard. It seems like individual issues are happening without a clear connection, making it hard to pinpoint the problem. I’m sure my GPU is fine, the VGA LED works, and the SSD is detected, but I still can’t boot. It feels like random luck.
Ordered an Asus Prime B550M-A Wi-Fi II for $67 on Amazon. It should help resolve the issue, as it’s brand new, comes with a Ryzen 5000 processor, and includes two SATA cables. The BIOS will still recognize the drive even if one cable is faulty.