BIOS Beep Code Definition

When power turn on, most computer system will first executing Power On Self Test (POST). If POST encounters any errors, it will generate beep tones (via the functioning chassis speaker), known as BIOS beep code, to alert the operator.

Different manufacturers might define different BIOS beep code definition. It is better to consult respective manufacturer for precise BIOS beep code definition.

Most of the BIOS beep code of an IBM compatible PC are related to random access memory (RAM) or central processing unit (CPU).

RAM related problems could be due to faulty RAM chip or improper RAM contact with RAM slot.

1. Disconnect power cord from power supply.
2. Unplug the RAM module carefully.
3. Clean the contact with non-static cloth.
4. Restore the RAM module carefully to the slot firmly.
5. Power on to perform POST testing again.
6. If that doesn't work, replace a known good RAM to eliminate RAM possibility.

CPU related problems could be due to a faulty CPU, overheat, or improper CPU contact with CPU slot.

1. Disconnect power cord from power supply.
2. Unplug the CPU with care.
3. Blow away dust found in the CPU heat sink and slot with a blower. Don't blow by mouth to prevent moisture accumulated within the contacts!
4. Restore CPU to the slot with care.
5. Power on the computer system for POST testing again.