Satellite A45 - S121 RTC battery low or unstable CMOS

I have a Toshiba A45-S121 that I got from a friend who has left the country...
I keep going back to the same message over and over again and cannot activate it because it keeps doing again and again.

The message is: "RTC battery is low or CMOS checksum is inconsistent, press F1 to reset the date and time." It would have been great if it was, that I should have done, but at this stage no button does nothing, and the only thing I can do is to restart... I looked on the net, and someone said to recharge, the main battery for 8 hrs, will do... NOT.

Another said to rest with charger for 15 h and have the laptop on at the same time... NO help there.
Another was told to change the battery Cmos... Did this... NO help.

I tried F12 thing... the computer is located in the startup Toshiba logo, and as soon as I press another key, it goes back to this message... I can't do the BIOS, and I can't run it from a CD, until I have this message.

HELP PLEASE.

Hanks a lot.

> The message is: "RTC battery is low or CMOS checksum is inconsistent, press F1 to reset the date and time." It would have been great if it was, that I should have done, but at this stage no button does nothing, and the only thing I can do is to restart

Usually this or similar message appears if the battery CMOS/RTC would be empty.
In this case, you should be able to solve this problem of the RTC battery.
How to recharge?
The laptop must be turned on and connected to the power supply for approximately 24 hours.

But I see you've also already replaced the RTC battery and this message still appears.
In addition it seems that you are not able to access the BIOS to change the date/time settings.
Well, this would mean that there is a serious problem on the motherboard

I think that only a laptop computer technician would be able to help you.

Tags: Toshiba

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