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BIOS Files shadowed


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#1 I Played WoW

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Posted 11 November 2010 - 10:56 PM

Alright my antivirus software was Norton 360 and I used MalwareBytes for weekly scans (trail version).
The only site with a known risk on it I went on was Photobucket ( not sure what the risks were.. hur...)

Anyway this is what my PC says after the laptop brand logo.
--
1015M system ram passed
cache sram passed 1024k

system bios shadowed
video bios files shadowed

atapi cdrom
fixed disk 0 hts54106 -----

ERROR
0271
warning
0251 system cmos checksum bad
---
After this screen my PC then shuts off, sometimes sooner.

No idea what to do without access to my LAPTOP.

Research says I have to restore my hard drive to factory settings.
No idea how to do that without turning on my PC though.
Any help is greatly appreciated. /wait

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#2 Platypus

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Posted 12 November 2010 - 03:46 AM

Research says I have to restore my hard drive to factory settings.

I'm not sure what research could have suggested to you that you'd need to restore the hard drive to factory condition to deal with a CMOS checksum error? And I'm glad you haven't been able to follow up on that advice... :)

The commonest cause of a bad CMOS checksum is a flat CMOS backup battery. What brand and model is your laptop?

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#3 I Played WoW

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Posted 13 November 2010 - 02:53 AM

Research says I have to restore my hard drive to factory settings.

I'm not sure what research could have suggested to you that you'd need to restore the hard drive to factory condition to deal with a CMOS checksum error? And I'm glad you haven't been able to follow up on that advice... :)

The commonest cause of a bad CMOS checksum is a flat CMOS backup battery. What brand and model is your laptop?


Compaq Presario v5000

#4 Platypus

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Posted 13 November 2010 - 03:18 AM

The CMOS backup battery (also referred to as RTC battery) is a CR2032 button cell. To replace it you'll need to remove the laptop's main battery, open up the cover over the Memory/Mini PCI compartment and remove the WLAN module. The battery is in a holder underneath this module. Replacing it will probably solve the bad checksum error. But afterwards you may also need to go into the CMOS setup using the keypress shown on the startup screen, and set some things like boot device sequence to how you want them.

Are you happy to tackle jobs like this? If you want the service manual to refer to, you can find it from here:

http://h20000.www2.hp.com/bizsupport/TechSupport/ProductList.jsp?lang=en&cc=us&taskId=135&prodTypeId=321957&prodSeriesId=499881

"Manuals" link at lower left on that page.

Edited by Platypus, 13 November 2010 - 03:20 AM.

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