Question about Toshiba Satellite M45-S169 Notebook

1 Answer

Toshiba Satellite M45-S169 won't boot

I receive on startup mean:

"System CMOS Checksum bad-Default configuation used"

"System BIOS Shadowed"

"Video BIOS Shadowed"

I press F2 and able login to bios. After I adjust, time, date...
I save and exit. after the computer saved and exit. I see the power still on, but not thing happen on the screen.
I change CMOS battery, but it still happen the same.
Can anyone help me solve this problem.
Thanks so much.

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You must restore your bios settings to the correct ones. contact toshiba customer support for the correct toshiba settings.

Posted on Dec 24, 2008

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1 Answer

Dell Inspiron 530. At start up gives CMOS checksum error defaults loaded. Options press F1, F2 or F12 computer does not react. Has new CMOS battery. RAM OK. Did CMOS clear and password reset. What else can...


When a Power Supply is plugged into power, there is a constant 5 Volts present. The 5 Volt Standby Power.

You press the Power On button.
This in turn presses against the Power On switch, located inside it's plastic assembly.

The Power On switch is a Momentary Contact Switch.
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A 5 Volt circuit that utilizes the 5 Volt Standby Power.

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(Sounds like a seedy novel)

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The Basic Input/Output System program is initialized.

BIOS looks to see what devices are connected, does a Ram Memory count, turns the Processor on, and hands the computer over to the Operating System.

A checksum is computed as an error-detecting code, to protect the BIOS settings stored in CMOS.
Each time the computer is turned on, this number is re-computed; and checked against stored values.

If they do not match an error message is generated, to tell you the CMOS memory contents may have been corrupted; and therefore some settings may be wrong.
Your BIOS assumed the settings were incorrect, and loaded BIOS default settings; stored in BIOS.

(Default = factory settings)

CMOS Checksum Error Defaults - Loaded

New battery? Nope didn't help.
Clear CMOS, and password reset? Nope didn't help.

Leaves Virus as the problem, or hardware component/s on motherboard; are bad.

My thoughts?
Bad motherboard.

("BAD motherboard. NO,...........you know you have been bad,....don't give me that look. You're a bad motherboard."

Lol!)

That's my diagnosis.


(Unless you put the CMOS battery in upside down.
+ goes UP)

Regards,
joecoolvette

Mar 17, 2013 | Dell Computers & Internet

1 Answer

Cmos checksum bad Chassis Intruded Fatal Error System Halted!


Hi,
To remove CMOS Checksum error, you have to remove the coin cell battery from the motherboard and install a fresh one. A coin-cell battery (CR2032) usually powers the real-time clock and CMOS memory. The battery is 3 Volts, 3/4" in diameter and has an estimated life of three years. When the computer is plugged in, the standby current from the power supply extends the life of the battery.
Just open the desktop, locate the CMOS (Coincell) and remove using screw driver. Replace the battery with CR2032 or an equivalent one.The following brands are used interchangeably for this item: Energizer (ECR2032), Duracell, Panasonic, Eveready, and 3M etc, which can be purchased from any local electronics store.
For Chasis Intrusion msg, go to the BIOS (when prompted, press the Function Key at the system startup) and locate the option of chasis intrusion option and disable it, save settings. Commonly, to enter the BIOS you have to press F2, F10 or DEL Key, depending up the make/ model of the PC you have.

Hope it helps! Good Luck! Thanks for using Fixya!
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Oct 08, 2011 | Computers & Internet

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My laptop shows me that the system Bios shadowed & video bios shadowed. And It saying ( entring Setup ...) but nothing happing and it stying like that. please help me


It is usually recomended that shadowing is disabled in the BIOs, so go to the setup Bios menu and select the default settings, press F10 and return.
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Got this error message WARNING 0251: system CMOS checksum bad. Default configuration used. Then everything went black. Can't find the wireless network (altho it IS working on other computer in the...


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easy......cmos checksum bad =

dead battery ...buy a new cmos battery for £2 ..make sure you install correct way up...

from any pc shop or ebay...

you will have to reset date /time in bios afterwards...f2 or delete usually to enter bios settings..
regards tonster

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Cmos Chechsum bad


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Error message


Open Your system and there is a Battery which looks like a Coin. that is CMOS Battery (CR2032) Change that battery and then Reboot your system and try go to BIOS menu with DEL , F11 , F1 or F2. Either of these Buttons can Work.

This will resolve your issue

Nov 26, 2008 | Computers & Internet

1 Answer

My Toshiba Satellite M45-169 keeps freezing


1. The battery on the motherboard has died. Replace battery.
2. The BIOS is corrupt, reflash BIOS.

Most likely #1, very rarely #2. Pop out the battery on the motherboard and replace it, after the first time you boot up your computer, go into BIOS and set everything the way it should be for your computer (usually just time and date) and then after each sequential time you reboot, that should take care of your problem.

Jun 24, 2008 | Toshiba Satellite M45-S169 Notebook

5 Answers

Bad BIOS checksum.... CMOS bad checksum errors


BOOT BLOCK COMPATIBLE VERSION VER .005
BAD BIOS CHECKSUM

CHECKING FOR CD ROM
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
NO CD-ROM FOUND
CHECKING FOR FLOPPY DISK
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
NO FLOPPY DISK FOUND

Does someone already fix this problem??????

Nov 15, 2007 | ASUS M2N-MX Motherboard

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