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ABIT NF7-S v2.0 beep codes
No beep at all - this means your motherboard is dead, either due to a defective or underpowered power supply, poorly seated CPU or RAM, or a dead-on-arrival board
One beep - board is working fine
One long beep then machine shuts down - faulty, improperly installed or missing CPU
1 short(Beep) - System booting is normally
2 short(Beep) - CMOS setting error
1 long - 1 short(Beep) - DRAM ERROR
1 long - 2 short(Beep) - Display card or monitor connected error
1 long - 3 short(Beep) - Keyboard Error
1 long - 9 short(Beep) - ROM Error
Long(Beep) continuous - DRAM isn't inserted correctly
Short(Beep) continuous - POWER supply has a problem
A two-tone siren - generally caused by overheating or out of specification voltages
Four beeps then machine shuts down - This is because this version of the BIOS will shut down your machine if no fan tachometer signal is detected on the fan header. Make sure you attach a fan to the FAN1 or FAN4 header or clear CMOS to reset to default (no checking).