Toshiba Portege R100 CMOS/BIOS PROBLEM at startup.
I am working on a Toshiba Portege R100 laptop. When I got it, the RTC battery Was stone dead. I replaced it with a new one. When I turn the machine on, The Toshiba screen flashes on for 1 or 2 seconds, then it goes to either one of two different screens. One screen says ( RTC battery is low or CMOS checksum is inconsistent !! ) Press F1 KEY to set DATE/TIME. If I hit F1, I go into the BIOS, but can do nothing at all in there. The other screen I get , once again, at startup, the Toshiba screen flashes on for 1 or 2 seconds, then it goes to a DOS LIKE screen, but only displays 8 or 9 characters in the upper left screen corner. Example: (A-UEVC=!!*e ) Once this DOS LIKE screen is displayed, it stays that way at every boot up. The only way I can get rid of it, is to unplug the RTC BATTERY, remove the Main battery, then start over. Then it goes to the message screen again, about going into the bios. But it only displays this ONE TIME. After that, at startup It goes right back the GIBBERISH in the upper left screen corner. This is a new one on me. Is there a way to reset the BIOS/CMOS? Can anyone HELP???? Thanks, Phil
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Hi,yes there is but you'll have to open the system up,if you have no prior I.T expertise I'd suggest you take to a qualified Technician,but if you do here is how:First remove the Battery,then uncouple the system taking of where each of the screws go to then locate the CMOS battery(small battery Lithium Ion mostly in the shape of a cent or smaller),it may be underneath the keyboard or just behind once the external cover is open.unplug it from the system for about an hour or two reconnect it,couple the system and boot,go to Bios,reset Date and Time and save,then exit.
To reset the BIOS read the information from this link.
In case of your Toshiba Satellite R15-S822 laptop the easiest method would be using software from Hiren's Boot CD as it's pretty hard to open it up and reach for the CMOS battery (which is on the motherboard) or the jumper.
In case nothing worked to reset BIOS password (taking battery out, reseting jumper J1) you can use thrid party software from Hiren's Boot CD to reset the password. You've got Kill CMOS on there, for example which wipes out CMOS. Here's the download link to the entire CD: http://www.hirensbootcd.org/download/Hirens.BootCD.12.0.zip
This information is intended for experienced users. It is not intended for basic users, hackers, or computer thieves. Please do not try any of following procedures if you are not familiar with computer hardware. I'll not be responsible for the use or misuse of this information, including personal injury, loss of data or hardware damage. So use it at your own risk.
A. By Using the Motherboard Jumper:
In most motherboards CMOS battery is soldered, which makes it difficult to remove the battery. In this case we use another method.
Almost all motherboards contain a jumper that can clear all CMOS settings along with the BIOS password. The location of this jumper varies depending upon the motherboard brand. You should read your motherboard manual to check its location. If you don't have the manual then look for the jumpers near the CMOS battery. Most of the manufacturer label the jumper as CLR, CLEAR, CLEAR CMOS, etc.
When you find the jumper, look carefully. There will be 3 pins and the jumper will be joining the center pin to either left or right pin. What you need to do, is remove the jumper and join the center pin to the opposite pin. e.g. if the jumper joins center pin to left pin, then remove it and join center pin to right pin. Now wait for a few seconds and then again remove the jumper and join the center pin to left pin.
Make sure to turn the PC off before opening the cabinet and resetting the jumper.
B. By Using Software:
I have found that BIOS/CMOS Password Recovery Tool is the most effective.: BIOS/CMOS Password Recovery Tool is a program that works instantly to remove any lost or forgotten BIOS/CMOS password. Simply boot your PC to DOS and execute the program, and get access to forgotten BIOS/CMOS passwords in just seconds
If you cannot access the machine after if has been powered up, it is
still possible to get past the BIOS password.
The BIOS password is
stored in CMOS memory that is maintained while the PC is powered off by
a small battery, which is attached to the motherboard. If you remove
this battery, all CMOS information (including the BIOS password) will
be lost. You will need to re-enter the correct CMOS setup information
to use the machine. The machines owner or user will most likely be
alarmed when it is discovered that the BIOS password has been deleted.
On some motherboards, the battery is soldered to the motherboard,
making it difficult to remove. If this is the case, you have another
alternative. Somewhere on the motherboard you should find a jumper that
will clear the BIOS password.
If you have the motherboard
documentation, you will know where that jumper is. If not, the jumper
may be labeled on the motherboard. If you are not fortunate enough for
either of these to be the case, you may be able to guess which jumper
is the correct jumper.
This jumper is usually standing alone near the
battery. If you cannot locate this jumper, you might short both of the
points where the battery connects to the motherboard.
If all else fails, you may have to clear the BIOS password by
resetting the RTC (Real Time Clock) IC (Integrated Circuit) on your
Many RTC's require an external battery. If your RTC is one of this
type, you can clear the BIOS password just by unsocketing the RTC and
1. If the batteries are dead then there's no way that you can charge them again. You're better off purchasing a new one. You can purchase one online by visiting the ToshibaDirect website or by calling them on 1-800-316-09202.
2. Yes, you can use the power cords to run the computer. Just plug them in using the power cords even with the batteries removed and it should work fine.
3. Yes you can but you might experience some current fluctuations. This is negligible on a CMOS battery though.