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ASUS Support Home Location : Forum > Motherboard > A8N32-SLI Deluxe  
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  Topic : [Problem]bad bios checksum coming back New Topic
Ewreck
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From: Netherlands
Posted:1/9/2008 3:56:00 PM # 1
I have a bad bios checksum for over a month now. What happens is, bad bios checksum apears when a start the computer. I repair it with the floppy as asked. it restarts the computer and the problem is solved. I can work with the computer, can turn on and off no problem. But if i start the computer the next day my problem is back. bad bios checksum. I have already replaced the battery and cleared cmos. Didn't solve the problem. tried other bios version. Still the same problem. Does anybody has clue how to solve my problem?

Erik

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A8N32-SLI DELUXE; Club3D Geforce 7900 GTX 512MB DDR3 2x DVI TV-OUT; AMD Athlon 64-bit X2 4400+ S939 HT2000 2MB Boxed; Corsair TWINX2048-3200C2 2x1024MB 400MHZ; Western Digital Raptor 36GB WD360GD-RTL2 10Krpm; Xfi music; OCZ Game Xtreme 700W
stealth
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From: Greece
Posted:1/9/2008 5:49:00 PM # 2
Come down to barebones(use only PSU,CPU,one VGA,one HD,one stick of Ram in B1 slot).
 
If you get the bad Bios checksum error don't recover the Bios with the floppy,i don't think the Bios is corrupted,when you see the error just turn off the power and clear CMOS for one more time,then at start up if you get the same mesage push F2 to load defaults and see if it works.

Also make sure the battery makes good contact,the contacts in there are very thin and easy to bend.

If you manage to make it work don't plug anything in the system until the next morning to check if you will get the same problem.

stealth

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A8N32-SLI Deluxe, AMD Opteron 185 2.6Ghz(Toledo)@3003mhz(273X11, 1.3v,HT 1365mhz), Asus EN8800GTX 768MB, Corsair Twinx 2048-3500LLPRO@DDR546 3-3-2-6 1T 2.8v, WD120GB SATA2, WD250 SATA2, X-Fi Fatality, NEC ND 4551A LabelFlash, PCP&C 750Watt Quad.
Ewreck
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From: Netherlands
Posted:1/9/2008 8:29:00 PM # 3

Ok thanx i will give it a try hope it works because it's getting a pain in the .... :)

Let you know if it works

Erik

 

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A8N32-SLI DELUXE; Club3D Geforce 7900 GTX 512MB DDR3 2x DVI TV-OUT; AMD Athlon 64-bit X2 4400+ S939 HT2000 2MB Boxed; Corsair TWINX2048-3200C2 2x1024MB 400MHZ; Western Digital Raptor 36GB WD360GD-RTL2 10Krpm; Xfi music; OCZ Game Xtreme 700W
Ewreck
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From: Netherlands
Posted:1/11/2008 2:50:00 AM # 4

Well i did as you told and at first the computer did not start at all, like it had no power at all. I could see the green powerled on the motherboard lightning up so i knew i had power.

After a couple of retries it suddenly started up and i could change the settings in the bios.

Now i only have to try to start the computer tomorrow to see if the problem is solved for ever.

Erik

 

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A8N32-SLI DELUXE; Club3D Geforce 7900 GTX 512MB DDR3 2x DVI TV-OUT; AMD Athlon 64-bit X2 4400+ S939 HT2000 2MB Boxed; Corsair TWINX2048-3200C2 2x1024MB 400MHZ; Western Digital Raptor 36GB WD360GD-RTL2 10Krpm; Xfi music; OCZ Game Xtreme 700W
stealth
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From: Greece
Posted:1/11/2008 5:21:00 PM # 5
I face almost the same problem with my sister's PC(A8N32-SLI mobo rev 1.01g),HD works,fans works but nothing on the screen and no beeps without any Ram installed.

I believe it's a PSU problem(Tagan 480W),i will get another PSU to try and i let you know if it works.

stealth

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A8N32-SLI Deluxe, AMD Opteron 185 2.6Ghz(Toledo)@3003mhz(273X11, 1.3v,HT 1365mhz), Asus EN8800GTX 768MB, Corsair Twinx 2048-3500LLPRO@DDR546 3-3-2-6 1T 2.8v, WD120GB SATA2, WD250 SATA2, X-Fi Fatality, NEC ND 4551A LabelFlash, PCP&C 750Watt Quad.
Ewreck
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Posted:1/14/2008 6:55:00 PM # 6

Hi stealth

The problem is still here. But i found out that if i turn the powerbutton off and switch off main switch and switch on main switch and power on the pc starts up normal.
Only the next day bad bios checksum is still back.
And still i als had a short period the pc started up normal for a couple off days.
So what can cause to not start up the bios correctly but after switching off/on main power to start up the bios correctly. I am puzzled.

Also i have contact with asus support now but this is a long slow pad to follow because they want you to do all the obvious things first.

cheers

erik

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A8N32-SLI DELUXE; Club3D Geforce 7900 GTX 512MB DDR3 2x DVI TV-OUT; AMD Athlon 64-bit X2 4400+ S939 HT2000 2MB Boxed; Corsair TWINX2048-3200C2 2x1024MB 400MHZ; Western Digital Raptor 36GB WD360GD-RTL2 10Krpm; Xfi music; OCZ Game Xtreme 700W
stealth
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From: Greece
Posted:1/14/2008 7:55:00 PM # 7

Quote:
Author: ewreck Posted: 1/14/2008 6:55:00 PM

Hi stealth

The problem is still here. But i found out that if i turn the powerbutton off and switch off main switch and switch on main switch and power on the pc starts up normal.
Only the next day bad bios checksum is still back.
And still i als had a short period the pc started up normal for a couple off days.
So what can cause to not start up the bios correctly but after switching off/on main power to start up the bios correctly. I am puzzled.

Also i have contact with asus support now but this is a long slow pad to follow because they want you to do all the obvious things first.

cheers

erik


I don't know what can cause the bad bios checksum error to come back every morning.

I was going to tell you to borrow and try another PSU and to start the mobo out of the case but i can't see how the PSU or a short circuit with the case could cause this problem.

Wait for Asus to see what they are going to say and then you can try things,also can you run memtest86+ on your Ram to see if you get any errors?

http://www.houseofhelp.com/forums/showthread.php?s=02cee14f8ce55aa4817bf8f4454d2b59&t=36142

The one for floppy is the easier one to use.

May billb have a better idea.

stealth

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A8N32-SLI Deluxe, AMD Opteron 185 2.6Ghz(Toledo)@3003mhz(273X11, 1.3v,HT 1365mhz), Asus EN8800GTX 768MB, Corsair Twinx 2048-3500LLPRO@DDR546 3-3-2-6 1T 2.8v, WD120GB SATA2, WD250 SATA2, X-Fi Fatality, NEC ND 4551A LabelFlash, PCP&C 750Watt Quad.
billb
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From: United States
Posted:1/14/2008 8:47:00 PM # 8

Quote:
Author: stealth Posted: 1/14/2008 7:55:00 PM
May billb have a better idea.

stealth

ewreck ... Please post your system specs.

A BIOS checksum error indicates that the size of the BIOS is different than windows expects.  There can be many causes. If you havn't done so already, you could try making windows get a new BIOS size by changing a setting in the BIOS (any setting), saving and exiting, and rebooting into windows.

Other possible causes:
Bad BIOS file
Bad BIOS chip
Bad hard drive
The battery contacts in the BIOS battery socket not making good contact with the battery.
And others, but let's see your system specs first. 


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Ewreck
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From: Netherlands
Posted:1/14/2008 9:46:00 PM # 9
Hi Billb

Thanx for your help already. My specs are:

[Motherboard Specification]
*Motherboard Revision : A8N32-SLI DELUXE
*Motherboard BIOS Revision : 1303

[VGA Card Specification]
*VGA Card Vendor : club 3d
*VGA Card Model : Club3D Geforce 7900 GTX
*VGA Card Chipset : Club3D Geforce 7900 GTX 512MB DDR3 2x DVI TV-OUT
*VGA Card Driver : latest

[CPU Specification]
*CPU Vendor : amd
*CPU Type : s939
*CPU Speed : AMD Athlon 64-bit X2 4400+ S939 HT2000 2MB Boxe

[Memory Specification]
*Memory Vendor : corsair
*Memory Model : Corsair TWINX2048-3200C2 2x1024MB 400MHZ
*Memory Capacity : 2 gigabyte

[HDD Specification]
HDD Vendor : western digital
HDD Model : Western Digital Raptor 36GB WD360GD-RTL2 10Krpm S
HDD Capacity : 36 gig

[Add-on Card Specificatio]
Add-on Card Vendor : creative
Add-on Card Type : Xfi music
Add-on Card Model :

Antec TruepowerII 550Watt EPS 24 pins Retail

*Operating System : WinXP prof sp2

I already tried new settings in my bios. Didn't help. What i don't understand is that after disconnecting the power the problem is gone. For a certain time then.

Erik



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A8N32-SLI DELUXE; Club3D Geforce 7900 GTX 512MB DDR3 2x DVI TV-OUT; AMD Athlon 64-bit X2 4400+ S939 HT2000 2MB Boxed; Corsair TWINX2048-3200C2 2x1024MB 400MHZ; Western Digital Raptor 36GB WD360GD-RTL2 10Krpm; Xfi music; OCZ Game Xtreme 700W
Ewreck
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From: Netherlands
Posted:1/16/2008 4:36:00 PM # 10
Hi

Here an update off my status in searching for a solution for bad bios checksum returning.
The support from asus techsupport is leeding me nowhere. The want me to check all parts in my computer for errors. What i need are suggetions where to look. Not to check everything in my computer and if i don't find a problem say hey then it must be the motherboard. I find there are more experts on the forum then there are on techsupport. ;)
So i went to my local computershop for assistence. After explaning my problem we came to the conclusion that my powersuply must be the problem. Because my problems started after my local powerplant had some problems, probably my powersuply became unstable.
For now i plugged in my pc in another socket and hey the pc started without a problem.
Now i have see if the problem stays away for more than a couple of days. If not I will buy a new powersupply.
I will let you guys know if my problem is solved for the next couple of days.

Erik

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A8N32-SLI DELUXE; Club3D Geforce 7900 GTX 512MB DDR3 2x DVI TV-OUT; AMD Athlon 64-bit X2 4400+ S939 HT2000 2MB Boxed; Corsair TWINX2048-3200C2 2x1024MB 400MHZ; Western Digital Raptor 36GB WD360GD-RTL2 10Krpm; Xfi music; OCZ Game Xtreme 700W
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