bad check sum

Toshiba / Dynabook satellite pro
April 19, 2009 at 06:00:10
Specs: not available
I got a toshiba dynabook satellite pro from a
friend. I dont know the details of this laptop
because. Everytime I turn it on, it says bad
check sum then check the system and press
F1. I pressed F1 but nothing happens. I tried
to turn the laptop on and off many times to see
if the problem will dissapear but it stays the
same. What should I do?

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April 19, 2009 at 07:44:24
Your information is missing the laptop's model number.
That model number should be on a label on the outside of the case somewhere.

That error is usually caused by a Cmos battery that is too weak or dead. Some Toshiba models have a rechargable Cmos battery, some don't. If the battery is rechargable, it may simply be discharged from the laptop sitting too long un-used, and leaving the laptop plugged in for a while will charge it.

See response 2 for Toshiba knowledge base info:

According to that info, if there is nothing wrong that doesn't allow the hard drive to boot, it should boot.
Ask your friend why he or she stopped using the laptop - there may be something wrong with the hard drive or the data on it.

You MIGHT be able to get into the bios if you repeatedly press F1 while booting BEFORE you see the prompt on the screen to do so - if that works, set the date and time, save settings, then if the hard drive can boot okay the hard drive should boot the next time you boot.

If the Cmos battery is too weak or dead, whatever settings you make in the bios are only retained as long as the computer is still running - e.g.the settings are retained when you reboot, but not when the computer is shut down and then booted.

Most more recent laptops will not boot the hard drive if the main battery is discharged below a certain minimal level. They will not boot the hard drive when the main battery is not installed and just the AC adapter is plugged in, or if the main battery is installed but it is too discharged, or if the main battery is defective and cannot be charged properly anymore, whether or not the AC adapter is plugged in.
Sometimes you just must plug the AC adapter in and let the main battery charge for a while.

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April 19, 2009 at 15:14:27
Bios could actually be bad either physically or firmware.

"Best Practices", Event viewer, host file, perfmon, antivirus, anti-spyware, Live CD's, backups, are in my top 10

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