To enter the BIOS, power on the PC and repeatedly tap or F2 when the ASUS logo appears.
| Symptom | Probable Cause | Solution | |---------|----------------|----------| | | 4-pin CPU power missing | Connect PSU cable to EATX12V | | Continuous long beeps | No RAM or bad RAM | Reseat RAM; test one slot at a time | | One long, two short beeps | GPU failure | Reseat GPU; disable onboard VGA | | Boot loop (on/off every 3 sec) | BIOS corruption or bad OC | Clear CMOS (CLRTC jumper) | | USB ports not working in Windows 7 | Missing USB 3.0 driver | Use PS/2 keyboard/mouse to install driver | | SSD detected but won't boot | CSM/Legacy vs UEFI mismatch | Change Boot Mode to "Legacy + UEFI" | asus h81m-k motherboard setup
Before assembly, verify that your components meet these specifications: To enter the BIOS, power on the PC