Power problem Hi, I had the Portege M400 connected in my car through the cigertte lighter which it has been working up till now. All of sudden the screen went blank and the computer turned off. Then the computer started making a beeping type sound while it was off. What could be the problem ?

Toshiba Portege M400 User Manual Fingerprint Reader Limitations
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Go to the Toshiba Mobile support web site for you exact model. Select Drivers download. Select Windows 7 32bits or 64 bit and download the latest versions of all that relate to the Tablet module, and that includes the Wacom driver.

If you Windows is genuine you can uninstall all the Wacom drivers then execute the Check new hardware wizard ( of Hardware changes) or even Windows Update

this should be what you need
http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/modelContent.jsp?ct=DL&os=&category=&moid=1362642&rpn=PPM40U&modelFilter=M400-S4031&selCategory=2756709&selFamily=1073768662

You look very much the unlucky owner of a busted battery.

I'm afraid the battery will have to be replaced. Meanwhile, do not use it with the power supply; not only it will do no good, as you already determined, but it might damage the power supply itself.

dear zy_martinez, get in to the Bios setting and look for SATA setting and disable it, now try to install again.

This happened to me. The computer will not work with the battery in it.
Solution: Take battery out and plug in without battery... It should work,
You will need to get a new battery

hi dear i dont think you can any test on this my addvice is take to toshiba service center ...

thnx

I have the M400 and it also does this. I don't know much about computers, but I found out when you apply a little pressure to the left of the touchpad and beneath the keyboard as you're flipping on the power slider, it boots up much more often. I know... sounds crazy and stupid, but it works for mine and it's been doing it for almost a whole year now. It doesn't work everytime, but whenever the light flashes and the fan cranks up to a million RPM i just pull the battery out

need a toshiba mother board for m40x250