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Helpful Reply680i lt cmos checksum error? Help!

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Hsoccer70
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2010/09/02 10:21:48 (permalink)
So, on my 680i LT I remember seeing a small blue cap that covered 2 pins. Somehow that cap has gone missing and I am now receiving a cmos checksum error during post. I read it could be a bad cmos battery, so I ordered a new one since it was only $2 and mine is about 4 years old anyways. While I am still waiting for that in the mail, I was just wondering if I have to have that cap on pins 2 and 3 for the bios to load properly? Right now they reload to default every time. If so, where could I find a replacement cap?

Also, I'm not sure if this is related, but my rear case fan keeps going out and I have to restart multiple times to get it to start up again. It does work when I power it from anywhere else on the mb though...Any ideas?

Thanks guys!

My set up:
Intel core 2 duo e6850 @ 3.0
EVGA 680i LT SLI mobo
EVGA gtx 460 1GB
4X1 Xmas DDR2 800
120 GB Vertex 2, 1.5 TB WD Green
Antec NeoPower 650W psu
Win 7 ult. 32 bit

Win 7 ult. 32 bit
EVGA 680i LT SLI
Intel Core 2 Duo E6850 @ 3.0
EVGA GTX 460 1GB @ 800/1600/1900
Creative X-FI Xtreme Audio
4X1GB CORSAIR XMS DDR2
120GB OCZ Vertex 2
1.5 TB WD Caviar Green
Antec NeoPower 650W psu

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bob16314
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Re:680i lt cmos checksum error? Help! 2010/09/02 12:18:23 (permalink) ☄ Helpful
Welcome to the forums Hsoccer..Yes, the jumper (cap) needs to be on pins 2 & 3 for normal operation..It's probably lost inside the case, somewhere..If you can't find it, I would temporarily use a very small ball of aluminum foil and impale it on the pins (being careful it only contacts pins 2 & 3) untill you can get a jumper from somebody or a PC repair shop (they should just give you one, they probably have tons of them laying around, they're probably only worth 5 cents)..You'll need to make any custom BIOS changes you had/need to because everything will be back to default settings now..Pin 1 is identified by a little triangle printed on the Mobo near the pin header..If you don't have the manual, you can d/l it here 

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Hsoccer70
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Re:680i lt cmos checksum error? Help! 2010/09/06 21:25:27 (permalink)
Thanks bob! The foil worked well, that is, it got rid of the error code. I'll try to make it to a PC repair shop and try to pick up a cap for a more permanent solution. Do you think that could have been the cause for my rear fan to malfunction? I just hope my mobo isn't bad.

Win 7 ult. 32 bit
EVGA 680i LT SLI
Intel Core 2 Duo E6850 @ 3.0
EVGA GTX 460 1GB @ 800/1600/1900
Creative X-FI Xtreme Audio
4X1GB CORSAIR XMS DDR2
120GB OCZ Vertex 2
1.5 TB WD Caviar Green
Antec NeoPower 650W psu

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bob16314
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Re:680i lt cmos checksum error? Help! 2010/09/07 00:42:07 (permalink)
I think the problem with the rear fan is that you'll need to go to the BIOS System Monitor Menu then to Dynamic Fan Control and configure the fans with SmartFan or just set the fans to Manual 100%..That'll probably do it..All your settings went back to default when you removed the CMOS battery consequently putting SmartFan back to default settings also.

* Corsair Obsidian 450D Mid-Tower - Airflow Edition * ASUS ROG Maximus X Hero (Wi-Fi AC) * Intel i7-8700K @ 5.4GHz * 16GB G.SKILL Trident Z 4133MHz * Crucial MX500 M.2 1TB * 2x WD Caviar Black 500GB * Seasonic M12 II 750W * Corsair H115i Elite Capellix 280mm * EVGA GTX 760 SC * Win7 Home/Win10 Home/Win10 Pro * 
 
"Whatever it takes, as long as it works" - Me
 
 
 
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