Have trouble getting posts on Mobo?
Have trouble getting posts on Mobo?
Recently I decided to refurbish an old computer for use with my TV. During the process, I got into Windows and its boot options but didn’t have time to complete the startup, so I dismantled everything. A few weeks later I wanted to rebuild it again and noticed my motherboard wouldn’t power on. I haven’t replaced any parts. I swapped the motherboard with another PSU to see if that was the issue, but nothing changed. After checking for bent pins or dirty CPU contacts, I cleared the CMOS, but results stayed the same. I also adjusted the motherboard, possibly replacing a capacitor, yet everything remained unchanged. I even tried jump-starting the motherboard, but it still didn’t come online and the fans didn’t spin up. Here are the components I’m using: Gigabyte B150M motherboard, Intel i5 6500 CPU, Ballistik DDR4 2666 RAM.
It’s likely you introduced an error while putting everything together, which triggered the system to switch into protection mode after power was applied through the PSU. The PC is reacting negatively to something it shouldn’t be handling, so it won’t boot. Review your assembly steps carefully to spot any mistakes. A faulty component, like a RAM stick, could also cause this issue. Even with prior experience, mistakes can still happen—such as plugging in the incorrect half of a split CPU power connector. Normally the plug is designed to fit only one orientation, but turning it slightly could allow it to work temporarily. Once you identified the problem, swapping the plug and ensuring proper alignment resolved the issue. Please share your findings so we can help further.
Another idea was to inspect the primary 24-pin ATX power connector and verify that all pins are securely seated without any protrusion from the plug. If a pin is misaligned or pushed outward, the connection will be incomplete and the system may fail to start.