Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: CMOS check sum error at POST in Win7

2 Weeks Ago   #1
loninappleton

Windows 7 x64 Ultimate
 
 
CMOS check sum error at POST in Win7

I've run into a CMOS checksum error after doing a number of jumper resets and I've changed the
battery. Battery is not new but at least different.

This is a rig I use to experiment and practice things like overclocking. Before I reinstall Win7 to hopefully clear the checksumproblem is there anything else I should try? Data loss will be minimal if I have to build a new scratchdisk.

Processor is AMD Phenom x3 950 or 945 showing 3.2 GHz in BIOS
Motherboard is an MSI 880gm and it had/has been in service for a long time. Still, this problem cropped up suddenly.

Other problem is if I get past the Checksum, Win7 goes to the screen for Startup Repair
which fails or Start Windows normally which stops in the motion graphic of (whirly spots) and hangs.

Also previously I loaded the repair disk ran the Fix Boot and Fix MBR routines. None of this
seems to stabilize to what it had been. Can this be a bad or failing CPU or even a BIOS chip?


My System SpecsSystem Spec
.
2 Weeks Ago   #2
loninappleton

Windows 7 x64 Ultimate
 
 

The MSI is back on and boots into Win7. I don't know how stable.
The original CPU is an Athlon x3 at something like 2.4 Ghz The MSI board BIOS allows opening a 4th core and reassigning the name to a Phenom x4 (Deneb).

After going through those CMOS resets the AMD Athlon is now restored according to CPUZ or MemoryZ which can be inspected in the BIOS.

I did some other tweak in the Cell Menu and I'll report that as a solved (if indeed that was it).

At this point I would like to be able to load the Default options without using random settings that
I think might work. :-/



So it wasn't a battery as is the normal response to a CMOS error. Core unlocking I have scant experience with. I have used MSI Overdrive program somewhat.
My System SpecsSystem Spec
2 Weeks Ago   #3
loninappleton

Windows 7 x64 Ultimate
 
 

Something I missed in ispection of settings was altered. The board has some DIP switched to
have a speed boost. I am going to reset those to default. These had not interfered so far as I know but it
is a troubleshoot I missed.
My System SpecsSystem Spec
.

2 Weeks Ago   #4
loninappleton

Windows 7 x64 Ultimate
 
 

Still able to boot with those switches set to default. They had been set to 20% or max "boost" before
this CMOS question came up. With that done I'm going to try the default BIOS settings.


The BIOS setting changed for the first round of successful boots were


Cell menu > scroll down to FSB.DRAM Ratio from AUTO to 1:2 (the base option)
Cell menu > Auto Disable DRAM/PCI Freq set to DISABLED


Will see what happens with those settings returned to default and those boost switches now
at default.
My System SpecsSystem Spec
2 Weeks Ago   #5
loninappleton

Windows 7 x64 Ultimate
 
 

Marked solved.


With all of the above restored to default and Optimized BIOS settings selected in the
BIOS option, I'm getting a good boot up. Throwing those boost switches did reduce the speed.


I'll continue to try things on my experimental machine one at a time.


Maybe this trouble shoot will help others
My System SpecsSystem Spec
Reply

 CMOS check sum error at POST in Win7




Thread Tools




Similar help and support threads
Thread Forum
POST needs F1 to start and I changed the CMOS battery
I am preserving an old Biostar board and doing some small upgrades. There is onboard video and the video seems to be ok. I ran a memory check from Win7 and no errors. I looked up F1 stop errors as hardware problem with the CMOS battery and changed that (admittedly, one I had in the tool box.) ...
Hardware & Devices
CMOS settings error during boot up.
Good morning to everyone. Why am I see CMOS settings error, press DEL to enter setup, press F1 to continue during boot up on everyday? Besides that, the CPU making loud sound during boot up and also when I am using my computer on everyday, I am not sure whether the fans or the HDD is the culprit.
General Discussion
CMOS Error
My pc is showing cmos error from last 2 days , and after it starts it shows the date 1 january 2010 and time 12:00 . I have also replaced the cmos battery thrice , but it drained after 1 or 2 months . please help :cry: i have gigabyte motherboard ..
General Discussion
CMOS Checksum Error Defaults Loaded: Post Transcend TS-USB3 Install
Hi there, I was hoping someone may be able to shed some light on this as it's got me completely stumped, and pretty down at the same time if the truth be told. I'll outline the problem below although the title of the thread may actually be slightly misleading. My system is as follows: ASUS...
Hardware & Devices
CMOS Error
My secondary rig keeps showing a CMOS error on boot, but only if it has been shutdown. On a restart or at desktop, there is no problem, and SpeedFan shows the Vbat at 3.10v, which is normally sufficient to indicate that the battery is okay. If I understand, the PS provides current to maintain...
Hardware & Devices


Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 13:46.
Twitter Facebook