How to recognize beep errors
Award BIOS beep codes
IBM BIOS beep codes
Phoenix BIOS Post codes
Other Post codes
Annoying isn't it? You have built your computer you switch it on and then nothing happens except a few beeps from the PC speaker. Frustration sets in as you try to figure out what is wrong with it. If you didn't already know the computer has already told you the problem. It can't speak of course but it can direct you to the problem. Its all in the beeps. The BIOS can recognise when the problem occurs and sends a signal out to send a certain amount of beeps through the speaker. These beeps then tell you the location of the problem.
Unfortunately not all the BIOS' use the same codes as each other. Two of the main BIOS manufactures AMI and Award (now Phoenix) have different codes for there errors.
AMI BIOS BEEP CODES
The following are AMI BIOS Beep Codes that can occur. However because of the wide variety of different computer manufacturers with this BIOS the beep codes may vary.
Beep Code Descriptions
Award Bios Beep Codes
AWARD BIOS BEEP CODES
The following are Award BIOS Beep Codes that can occur. However because of the wide variety of different computer manufacturers with this BIOS the beep codes may vary.
Beep Code Description
If any other correctable hardware issues the BIOS will display a message.
IBM BIOS beep errors
The following are IBM BIOS Beep Codes that can occur. However because of the wide variety of models shipping with this BIOS the beep codes may vary.
Beep Code Description
The IBM BIOS works with Short and Long beeps as well as the Award BIOS. However the IBM one does still have codes to work from.
PHOENIX BIOS beep errors
PHOENIX BIOS BEEP CODES
The following is for PHOENIX BIOS Q3.07 OR 4.X
Beep Code Description / What to Check
Macintosh Startup Tones
MACINTOSH STARTUP TONES
Re: How to recognize beep errors
Each time the computer boots up the computer must past the POST. Below is the common steps a POST performs each time your computer starts.
1. Test the power supply to ensure that it is turned on and that it releases its reset signal.
2. CPU must exit the reset status mode and thereafter be able to execute instructions.
3. BIOS checksum must be valid, meaning that it must be readable.
4. CMOS checksum must be valid, meaning that it must be readable.
5. CPU must be able to read all forms of memory such as the memory controller, memory bus, and memory module.
6. The first 64KB of memory must be operational and have the capability to be read and written to and from, and capable of containing the POST code.
7. I/O bus / controller must be accessible.
8. I/O bus must be able to write / read from the video subsystem and be able to read all video RAM.
If the computer does not pass any of the above tests, your computer will receive an irregular POST. An irregular POST is a beep code that is different from the standard one or two beeps. This could be either no beeps at all or a combination of different beeps indicating what is causing the computer not to past the POST.
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