The PC shut down due to a minor tilt incident.
The PC shut down due to a minor tilt incident.
Hello everyone. I was working at the desk, shifted a bit in my chair and pressed the system with my knee—it wasn’t a hard hit, just a slight bump, but it froze completely. I’m used to this kind of issue because I have faulty SATA cables, so I thought there might be another problem with the disk connection. After restarting, it kept turning on and off repeatedly, briefly powering up before shutting down instantly. My suspicion was a short circuit. That’s when I realized something was seriously wrong and decided to replace it entirely. I took it apart, reassembled it with minimal components, tried to boot it, but it still wouldn’t start or stop normally. Eventually, a new issue appeared—it froze during the first diagnostic check (CPU) and stopped there. I attempted to reconnect the processor and RAM multiple times, even without RAM, but nothing worked; it remained stuck at the initial stage. There were no bent pins, all wires seemed intact, and the CPU only warmed slightly during diagnostics. I don’t have any spare parts to test, and my friends also couldn’t help. My conclusion is that the motherboard likely failed. Also, there are LEDs on the motherboard that lit up when the PC was running—you can see them in the last two images (three front, four back)—they probably separate audio signals from the rest of the board. Now they’re not working. I looked up the video on YouTube and saw similar lights during diagnostics. So my question is: what should I do next? What else should I check or try? Any suggestions about possible failures or causes? Is my idea that the motherboard died correct? And are there other components that could have failed, what’s dangerous to install on a new board? Sorry for any mistakes and unclear wording.
CPU light stuck at 00, postcode mobo dead. Swap the board since it seems to have given up. For repair, remove heatsink and CMOS battery, briefly clear CMOS with short power button press, rinse thoroughly with water, soak in water for about an hour or two, then dry completely—shake the board out after drying to remove excess moisture. This method has cleaned and fixed the board several times before.
Did you apply too much pressure when securing those motherboard screws? It’s possible they removed the mounting posts instead of turning them off, which might have pressed the layers together and created a short circuit. The fasteners should stay slightly loose so they can be removed without pulling out the mounting brackets, though this really depends on how much tension was applied. I’m not sure about this happening often these days; it seems newer boards with wider ground planes might be less affected. I became a bit cautious after seeing images of boards showing burn marks around the screw holes, but in theory it could just affect the capacitance and make it harder to notice.
Also tightening the cooler too much might lead to problems I've seen when joining a 775 copper core onto an i5 750. That issue likely messed with the BCLK OC feature, but adjusting the mount resolved it. If the OC capability is affected, it could potentially cause further complications later.
They weren't that snug, and I don't believe it's cooler since I use plastic fasteners with DeepCool. It seems the installation can't be too tight. I expected the motherboard to handle diagnostics without RAM, then report a missing RAM issue. I'll attempt to power it on again with RAM and share the outcome. Update: I tested every slot with every stick, tried all combinations, but nothing worked. Update 2: I purchased a new motherboard and everything functioned properly; the real issue was with the previous one, thanks everyone for your help!