PC occasionally fails to start, fans remain inactive, and no sounds or indicators appear.
PC occasionally fails to start, fans remain inactive, and no sounds or indicators appear.
Occasionally this occurs in the morning when trying to boot a PC. I press the power button but nothing happens—no beep codes, no LED signals, and the fans aren’t spinning. The motherboard lights stay on, indicating the PSU is supplying power. After a few minutes it finally starts, though the Windows clock is off by about three to four hours, which usually happens when a boot problem exists. This suggests there might be an issue with the CMOS battery or the motherboard itself. Could a bad CMOS prevent the PC from starting? Would putting the PC to sleep be a short-term solution?
Uncertain about how your BIOS is impacted since defaults are usually used. Could a bad CMOS battery trigger these boot problems? Possible causes vary by motherboard brand. Other factors that might lead to incorrect system time after boot issues include hardware malfunctions, software glitches, or power supply instability.
From what I understand, the CMOS battery just supplies power to preserve BIOS settings. It seems likely that if the battery fails or behaves strangely, it will reset those settings because the BIOS doesn’t have power to save them. The boot order is included in the setting. Since your motherboard is relatively new, it probably has a good battery installed. I’ve had an older PC with the same kind of setup, so it didn’t have issues. If you’re really concerned, you could replace the battery yourself—its cost is minimal. Does this issue apply to your build generally, or is it a recent problem? Are only some components new, or the whole system?