Question about MSI Galaxy KT400 (MS-6596-20B) Motherboard

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Dead PC, Pheonix Award Bios post code 2A, ASUS A7V400-MX SE Mothe

CPU, Memory, HDD, all tested on know good unit working fine. Post card gives 2A ('clear 512k base ram?) Cannot get any further. Could this be a dead/corrupt BIOS chip?

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  • Peter Steiert
    Peter Steiert May 11, 2010

    I know you tested the RAM, however have you tried a different stick or booting on only one stick?

    Tried a CMOS reset yet?


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There is 3 reason for 2a error

Ram power supply mosfet open or short
bios programme currupt
front side between bridge and ram array registance openDead PC, Pheonix Award Bios post code 2A, ASUS A7V - 654152f.jpg

Posted on Feb 02, 2009

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Twice beep sound is coming. Booting is not happening for my p4p800 mx/s board


Hello !
If you check out ASUS support, you will find this troubleshooter for the motherboard not booting :
1. Please clear CMOS.
2. Please take out your memory cards and video card, try to clean their golden connectors with a rubber, then reseat them back.
3. Please take the CPU cooler out, add some thermal paste to the CPU surface, then reseat the cooler back and keep the cooler tightly installed.
4. Please keep the necessary components(CPU, one memory) onboard for a test.
Finally, we would recommend you to replace a BIOS battery to have a test.
Also, by looking over beep codes I have found for AMI BIOS these problems for the 2 short beeps :
1. Memory parity error (Description : A memory parity error has occured in the first 64 KB of RAM. The RAM IC is probably bad).
2. POST fail (Description : One of the hardware tests have failed).
If you have done those and it still doesn't boot, let me know I'll try to find other solutions.
All the best !

Aug 03, 2011 | ASUS P4P800-MX Motherboard

Tip

A Comprehensive Guide on Computer Beep Codes. (AWARD BIOS)


When a computer is booted up its BIOS, it performs a power-on self test, also known as POST, to test and verify the computers hardware and to make sure all components are working properly. Here's a comprehensive guide on how to determine which component has failed on a particular beep code and give you an idea on where to start for troubleshooting.

The exact meaning of the beep codes depends on the type and version of BIOS that you have. The three most popular types of BIOS are those made by Award, American Megatrends (AMI) and Phoenix. If you are using a PC made by a company that writes its own BIOS, e.g. DELL, HP, etc, you will have to consult your PC user's manual or the company's web site for assistance.


Beep Codes for Award Bios.

iantechson.png

1 long, 2 short = Video adapter error

Troubleshooting: Either video adapter is bad or is not seated properly.

Repeating (endless loop) = Memory error

Troubleshooting: Check for improperly seated or missing memory. Reseat the memory if you can.

1 long, 3 short = No video card or bad video RAM.

Troubleshooting: Reseat or replace the video card.

High frequency beeps while running = Overheated CPU

Troubleshooting: Check the CPU fan for proper operation. Check the case for proper air flow.

Repeating High/Low = CPU failure.Either the CPU is not seated properly or the CPU is damaged. May also be due to excess heat.

Troubleshooting: Check the CPU fan or BIOS settings for proper fan speed.


I will be posting more tips on other versions of BIOS.
Hope this helps.

on Mar 25, 2011 | Computers & Internet

2 Answers

BIOS WON'T START OR LOAD, ANYONE CAN HELP ME? Mainboard: P5S-MX SE Having troubled my CPU, it works for 2 years but now this is what happened. It won't start. First, i detached all the hardware attached...


Hi,
Remove The CMOS Battery, For 10-15 seconds to reset The Bios to it,s default settings.
Try the memory Module/Ram in a different Slot.
Re-seat the CPU.

Mike @ Compurepair.

Oct 16, 2009 | ASUS motherboard P5S-MX SE LGA775 SiS671FX...

3 Answers

Memory upgarade


Yes, it will work. Remember that all memory will operate at the speed of the slowest memory though so unless you're completely replacing the memory it won't increase the speed of the memory.

Jul 21, 2009 | ASUS A7V400-MX Motherboard

1 Answer

A7V400-MX will not boot


In such cases its practical to change the SMPS with a working power supply of the same rating and then trying it out. If with the new power supply it works fine then cange your SMPS. Also make sure that all cables are snug tight and generally ree from dust. The same applies to your RAM too................sodeep

Apr 18, 2009 | ASUS A7V400-MX Motherboard

1 Answer

At POST I get 2 short beeps


it depends on the bios chip maker Here's some other beep codes:

for Award and Phoenix BIOS:

1 short beep: Normal
2 short beeps: CMOS error
1 long and 1 short beep: DRAM error
1 long and 2 short beeps: Video card error
1 long and 3 short beeps: Keyboard error
1 long and 9 short beeps: ROM error
Long continuous beeps: DRAM not installed correctly
Short continuous beeps: Bad power supply


AMI BIOS:

1 short beep: DRAM flash error
2 short beeps: DRAM ECC check error
3 short beeps: DRAM detect error
5 short beeps: CPU error
6 short beeps: Keyboard error
8 short beeps: Video card error
9 short beeps: ROM error
1 long and 3 short beeps: Bad DRAM
1 long and 8 short beeps: Video card error


Invoking Beep Codes

.

If the computer is actually functioning and the computer beeps continuously, then there is a problem with a voltage on the power supply being incorrect or the CPU overheating. IMMEDIATELY go into the BIOS and check CPU temperature, fan speed and voltages

**********************************************
BIOS Beep 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

# of Beeps Error Description
1 Refresh Failure The memory refresh Circuitry is faulty
2 Parity Error Parity error in the Base (1st 64K) of memory
3 64K Base Memory Error Memory error in the base memory (1st 64K)
4 Timer Not Operational Timer 1 is not functioning (also caused by error in base memory)
5 Processor Error CPU error
6 8042 Gate A20 Failure Unable to switch to protected mode
7 Processor Exception Interrupt error The CPU on the CPU card generated an interrupt error
8 Display Memory Read/Write Error Video adapter is missing, incorrectly seated or has faulty memory
9 ROM checksum error The ROM checksum does not match that of the BIOS
10 Coms Shutdown Register Read/Write The shutdown register for coms RAM has failed
11 Cache Memory Bad The cache memory test has failed. Cache memory will be disabled. *** DO NOT enable it ***


With the first 3 beep codes, its well worth re-seating the memory just to make sure that it's in correctly. 8 Beeps is probably the most common in my experience. Can be caused by a badly seated Graphics card. If you have re-seated it then check with another Graphics card in the board.

Always check for loose components before sending the board back as this is the main cause of errors on the POST.



Award BIOS

Award states that they now only use one beep from there BIOS. This beep is one long beep and then two short beeps. This indicates a graphics card problem. Any other beeps should be treated as a RAM problem first and then the board sent in to be inspected.

The reason that the Award BIOS only uses the beep code for display problems is that it tries to display the error on-screen if at all possible. If the BIOS cannot initiate the display adapter then this causes the BIOS to make the beep code for a display error, which must be corrected before any other errors can be determined. Memory Test fails and hard disk failures etc will all be displayed on screen

IBM BIOS

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.

Beep Code Error
1 Short Beep Normal POST, System booted OK
2 Short Beeps POST Error - Code on Display
No Beep Power supply or Motherboard error
Continuous Beep Power supply or Motherboard error
Repeating short beeps Power supply or Motherboard error
1 short, 1 long beep System board error
1 long, 2 short beeps Display adapter error (MDA/CGA)
1 long, 3 short beeps Display adapter error (EGA/VGA)
3 long beeps 3270 keyboard card
Phoenix BIOS
The Phoenix BIOS works on a slightly more complicated manor than the others. It does display an error code for you and produce a series of beeps. This BIOS produces its beeps according to the hexadecimal code the error produces. The Phoenix BIOS has many different codes for its possible errors and so many different beep codes. Rather than list the entire section here, I have provided a link to the official PDF file containing the codes and how they are derived.

Phoenix BIOS Post Codes

System board errors should be looked at by a specialist, Again always try to re-seat components to ensure they are in correctly. If necessary take all components out except for the RAM CPU and graphics card, then try the system. Re-seating components is the number one fix for getting past the POST screen. One badly seated components can cause the entire system not to function. so pick out your bios and follow the steps above to diagnose .hope this helps

Jan 05, 2009 | Dell Dimension 5150 (DIM515MIN) PC Desktop

1 Answer

I have an Asus p4s533-mx motherboard which boots and runs fine (sometimes). But when I perform a warm boot, it often won't pass POST. The beep code is one long and two short. If I power it down and let it...


The response from ASUS tech support - It's a standard Award BIOS, so they're the standard beep codes.

So I wrote the following on page 3-4 of my user guide:

1 long + 2 short = Video adaptor error
1 long + 3 short = No video card or bad video RAM

high freq beeps while running = Overheated cpu

repeating high/low = cpu problem

repeating (endless loop) = memory error

Sep 29, 2008 | Computers & Internet

1 Answer

No post


Have you:

Made sure everything is connected properly?
Reseat (remove and put back in) the components (Memory, Video card, HDD, cables)?
Run with only the essentials (CPU, Motherboard, video, RAM)?

Will the PC even power up?

Jun 28, 2008 | ASUS A7V8X-MX Motherboard

1 Answer

Asus a7v400-mx se troubleshooting


One question:has the PC been working with monitor and all working properly at some stage. Or is the a new installation.

Dec 11, 2007 | ASUS P5RD1-VM Motherboard

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