CLEANED OUT TOSHIBA L355D AND STILL SHUTS DOWN

If you can find a part number, cross-reference the part. It's quite possible, but I can't say for sure. Try here for a part number, usually it will list all the Toshiba Laptops it is compatible with: http://www.ambry.com/page/toshiba-computer-parts.html Try here to verify parts: http://www.ebay.com/sch/i.html?_odkw=touch+pad+parts&adpos=1t1&crlp=25095060679_2416792&MT_ID=69&tt_encode=raw&_osacat=0&clk_rvr_id=477955456309&geo_id=9982&keyword=touch+pad+parts&adgroup_id=3878326159&crdt=0&_trksid=p2045573.m570.l1313.TR0.TRC0&_nkw=toshiba+L355d+touch+pad+parts&_sacat=0&_from=R40

What you are talking about is called no POST. You either shocked the cmos and the bios wont load or something is not hooked up right.

Users Manual:
http://cdgenp01.csd.toshiba.com/content/support/manuals/userguides/su2428373/users_guide_28065A.pdf

Resource manual:
http://cdgenp01.csd.toshiba.com/content/support/manuals/resourceguides/su2121653/GMA500579011_web.pdf

Drivers & Downloads:
http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/modelContent.jsp?ct=DL&os=&category=&moid=2232775&rpn=PSLE8U&modelFilter=L355D-S7901&selCategory=2756709&selFamily=1073768663

check all leads from motherboard to hard drive including electrical extensions and all of your cd/dvd drives make sure connections are secure dust free and not faulty
computers need all power and data to travel through every working device and to finish its cycle
so any faulty lead will end in computer error or shutdown or fail to boot

make sure your computers RAM modules are securely seated with no dust in the sockets also the Cmos battery has charge and seated with no dust in the sockets
some motherboards cmos batteries are soldered in
might be getting hot check your CPU make sure it has a thermal paste and a dust free and secure seating

could be a memory dump you might be running to many programs at the one time placing to much strain on the CPU you might not have enough RAM random access memory

hope this helps you

remove the battery then put it again and check, if the problem persists, also remove the RAM then put it again and check , if still there is a problem then the fault is in the power ic of the laptop mother board better consult to some technician

You can try pressing and holding the zero key when you first power up the machine it may allow you to access the recovery partition on the laptop.

http://cdgenp01.csd.toshiba.com/content/support/downloads/PMA500339010_web.pdf

Robert from Blitware

it looks like your computer haves a password protection for startup try to reset the bios or try to type one of these passwords Toshiba 24Banc81 toshy99

you can download all drivers from here.
http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/modelContent.jsp?ct=DL&os=&category=&moid=1998609&rpn=PSLE0U&modelFilter=L355D-S7809&selCategory=3&selFamily=1073768663

go to this site you can download the manual

http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/modelContent.jsp?ct=DL&os=&category=&moid=2144780&rpn=PSLE0U&modelFilter=L355D-S7825&selCategory=3&selFamily=1073768663

i am having the same problem and its not software related as i have my laptop dual booting with sabayon 5.0 and im getting the same result in that OS so this tells me that the hardware is failing
if your problem is the same as mine have you exposed your computer to cold or humid atmosphere?
mine sat in my trunk for a week this newyears