The PC fails to start when using the ATX 12V connection.
The PC fails to start when using the ATX 12V connection.
I powered up my PC briefly earlier today to prepare for breakfast. When I returned, it was still off and wouldn’t turn on. Feeling a bit anxious because this was my first encounter with such a problem, I began searching online for possible solutions. I suspected a power supply issue, so I tried the usual method of connecting a paperclip to see if it would help. After plugging components one by one and attempting to restart, everything functioned correctly. I was relieved, thinking maybe keeping the battery away from the motherboard during setup would have resolved it. Then, just as I was returning the computer to my desk, I noticed something unusual—those yellow-black cables and the 4-pin plug were hanging out. I quickly reinserted them into the socket, and it worked again. Still unsure, I’m hoping this isn’t a motherboard fault since I don’t have the funds or patience for a replacement. I’m reaching out to others for advice, as I’m almost ready to take the computer to a repair shop.
You don’t have a multimeter? It seems like the 12V EPS connector is malfunctioning. The PSU will notice the surge right away and switch to protection. You might notice a brief LED flash or slight fan activity before it activates. Without proper tools, figuring out the exact issue becomes very difficult. Check the connector area—ensure it’s clean and free of dust or debris. If the problem lies with the board, repairing it may be more expensive than replacing it entirely. If you spot a clearly damaged capacitor, you can attempt to remove it and continue testing, though other components will likely need soldering.
I don’t have a device to measure voltages or similar functions. Your observation is accurate: the side fans start to spin slightly when I attempt to power on the computer with the cable connected. It might have been better to mention this earlier. The area seems quite tidy, and it doesn’t appear dust could interfere with the connection.
The motherboard is the Medion B360H4-EM with an I5 8400 chip. I've never removed one before, but it shouldn't be too difficult.
It’s usually best to have a skilled technician examine the system. You can attempt some checks yourself: take out the RAM and power on the PC. It won’t start without it, but if the fans run longer, it suggests a RAM issue. Repeat the process with the CPU—remove it and power it up. If it stays on, the problem likely lies with the motherboard, which narrows down the issue and makes repairs simpler. If neither step helps, the board is likely dead and replacing it will be more cost-effective than trying fixes.
Implies the module might have failed, leading to a voltage drop on the EPS input. Fans briefly increase speed during startup until the power supply identifies the issue and shuts down.
You just completed what was requested. The issue appears to rely mainly on that single slot. If it’s unplugged, it powers on with and without the RAM connected. The same happens with the CPU. When I power it up with the plug in, it just flickers briefly before shutting down completely. I’ll arrange a checkup to see if it’s worth fixing. If not, it’ll be costly for my budget. It seems I have limited options. Thanks for your assistance.
Only a single offer for 90 euros was located, which is going to be challenging.