My toshiba satellite A355D touch pad is not working. my husband told me that probably my kid turned it off. if that is the case... how can i turn it on?

go to this link should help you out... CMOS battery in Toshiba A355D S6921 laptop Google Search

CMOS battery in Toshiba A355D S6921 laptop Google Search try this link might help you.

Janice, This is info from Tomsguide.com
1- Turn off computer, disconnect the power cord, remove the battery.
2- Press the Power On button for 10 seconds
3- Replace battery and/or connect power cord.
4- Turn On computer + immediately press F2 key repeatedly
5- Press F9 then press Enter
6- Press F10 then press Enter
May have virus or corrupt driver, run your anti virus and try reloading divers for mouse and touch pad, you may have to use system restore to an earlier date when thins were working OK.
Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
http://ccm.net/forum/affich-689275-toshiba-satellite-mouse-pad-stopped-working
Toshiba Satellite keyboard and touchpad don work
Toshiba Satellite Cursor is not responding

The BIOS and Supervisor passwords cannot be removed or changed unless you know the existing password(s). If you forget your BIOS or Supervisor password, you will have to have the password removed by a Toshiba Authorized Service Provider.

You misread the model. It is a toshiba A355D s6889 S, not a 5. What is your specific problem?

The CMOS battery is on the motherboard and in order to get to it you have to take apart the laptop.

Try to update the BIOS by checking the manufacturer's website for any BIOS update.
http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/modelContent.jsp?ct=DL&os=&category=&moid=2201148&rpn=PSALEU&modelFilter=A355D-S6889&selCategory=3&selFamily=1073768663

Choose the OS you are using and check if there are any BIOS updates recently.

else try to press F2 as soon as you turn on the laptop and enter into the BIOS set up.
There's an option to restore defaults. Once this is done Save changes and the system boots.

Restart the system and the AC adapter will be detected.

Ok, if you have never replaced a laptop screen before, you might not want to do this one first. It appears that the screws on the face of the screen have to come off first. They are under the rubber footies. After screws are out, tape them to a piece of paper, and label what they were for. Do this for all screws you remove, After screws are out, you will open the screen as far as it will go without forcing it. Using a plastic card, or similar PLASTIC tool, slide into the crack around the perimeter of the screen facia. You will hear "pops" as the snap clips are opened. The lower case of the laptop may also need to be removed. This repair is best left to someone with experience, so be careful to remember what screws go where. This is very important as a long screw in the wrong place will destroy your machine. Check out this page that sells parts for this machine:
http://www.laptoprepairparts.com/html/LRsearchmodelresults.asp?brand=toshiba&model=a355d-&txt=Satellite A355D series (A355D-S6881, A355D-S68811, A355D-S6885, A355D-S6887, A355D-S6889, A355D-S6921, A355D-S6922, A355D-S69221, A355D-S6930, A355D-S69301)

you will need to copy and paste since the website uses spaces, and the models were truncated. Without seeing the actual device in person, it would be difficult to walk you through it. Just remember how you took it apart, tape screws to paper with descriptions on where they went, protect against static, dust, water, and always use plastic tools to avoid scratches.

This may be a simple driver glitch. Try uninstalling the touch pad drivers from the device manager, then reboot. The machine will find the touch pad and reinstall the drivers. The touch pad either works or it doesn't, there's no in between, so if this doesn't work, then I'm afraid you'll have to replace the touch pad.