I need to replace a CMOS battery on a Toshiba Satellite P200

test all leads that attach to your hard drive including electrical extensions SATA

the leads from your (motherboard to your hard drive) make sure they have a secure dust free connections and are not faulty or just replace them they could be faulty

make sure all leads that are attached to your drives dvd\cd have secure connections and are not faulty

even something as small as an electrical extension or a faulty fan lead can cause you problems computer needs all of the data and power to travel through every working device and to have an end for a computer to be able work properly

a motherboard and a hard drive any leads between them will fail before your motherboard or your hard drive check all electrical extensions make sure they are securely seated even the cd/dvd drives need to have current go through make sure these devices are working

check the CPU make sure it has thermal paste and dust free secure seating

also check your computer ram modules and cmos battery make sure it has charge and they are dust free and securely seated some motherboards cmos batteries are soldered in

hope it helps

New recharageable batteries need to be charged overnight and fully discharged several times before they reach their full charge capacity.

Most likely the CMOS (Bios battery), which is a small silver coin shaped battery on the motherboard needs changing. This maintains the correct time when the laptop is switched off. They last for up to 3 years then need replacing. (example in picture)

http://cgi.ebay.co.uk/CMOS-RTC-Battery-Toshiba-Satellite-A105-Series-/270751984156?pt=US_Batteries&hash=item3f0a136a1c

Be careful in changing the battery, If you have not done this before, refer to a computer repair shop.

This particular model got it's CMOS (RTC) battery soldered to it's motherboard. You can't just replace it, you should take it to an experienced IT technician, who's good with soldering, in order to de-solder the one that's on board, then solder a new replacement.

Your RTC battery or CMOS battery is either dead or too low to keep the correct settings, windows will not operate correctly without the proper date and time kept. This battery has to be replaced for your system to operate. Below is the service manual that will advise you of the proper procedure to replace the battery. Once the battery is replaced, reboot the laptop, go to the BIOS screen and reset the date and time, then reboot as normal. In the case of your particular laptop, the laptop has to be disassembled down to the lower case and motherboard. The included service manual has the procedure for this.

http://tim.id.au/laptops/toshiba/satellite%201400%201405.pdf

http://www.tomshardware.com/forum/247842-30-replace-cmos-battery-toshiba-satellite

cmos battery is present inside the motherboard...go to tosibha website and enter ur model no...der u can download the hardware mannual for the particular model

On Toshiba laptops you hit the ESC key as soon as you turn it on & then you
are given the option to hit the F1 key to enter bios.

As to the cmos battery, they couldn't have hidden it better if it was the Queen's diamond!

It is near the bottom of the laptop on the right side, almost directly beneath the pause/break key.
Problem is, you have to disassemble the entire laptop to get at it!

Disassembly instructions for the Satellite A10 are here
http://www.irisvista.com/tech/laptops/ToshibaA15/SatelliteA15_laptop_disassembly_1.htm
Best of luck
Barb

remove the keyboard the mobo battery is there you need to unsolder one end of it, lift the leg, and turn it on that way for it to clear.. you will have to resolder once done.. have the skills or find someone that does... and you're set..