I need a schematic diagram for toshiba Satellite Pro L300-164

Those are just Block Diagrams, not schematics........

@Ahmed,

What you are looking for are Power MOSFET's.

They are based on the SOIC-8 narrow - Package,

http://en.wikipedia.org/wiki/SOIC-8

Small Outline Integrated Circuit - 8
There are EIGHT J-leads......4 on each side

Don't believe you are going to need a schematic, Amhed.
(Man, I like that name! Pretty cool!)

What you are looking for is the DC - DC circuit on the motherboard.
(DC to DC circuit)
This will be where the DC Power Harness plugs in.

[The DC Power Jack (DC_IN) is the jack on the laptop, that the AC adapter (Charger); plugs into.
With your model the DC Power Jack is attached to a cable, and the cable ends in a small white male plug connector.
It is now a DC Power Harness,

http://www.ebay.com/itm/TOSHIBA-Satellite-L300-Series-Laptop-DC-Power-Jack-Connector-Cable-Socket-PJ130-/200828538465?pt=Laptop_Adapters_Chargers&hash=item2ec2504e61 ]

The DC Power Harness plugs into the motherboard, on the Top side of the motherboard.

Now turn the motherboard over, and look at the same area; on the Bottom side of the motherboard.
(Bottom side has Processor, and Ram Memory)

http://www.auctiva.com/hostedimages/showimage.aspx?gid=1456843&ppid=1122&image=598666972&images=598666972,598666993,598667028,598667048,598667063,598667089,598667104&formats=0,0,0,0,0,0,0&format=0

See if any of those Power MOSFET's are burned.

Using the HP Pavilion dv6000 series, and Pavilion dv9000 series of Notebook PC's, as an example,

http://mayohardware.blogspot.com/2010/04/important-parts-on-dv6000-and-dv9000.html

These two series use a Fairchild Semiconductor Industries - FDS6679 - Power MOSFET; and an Alpha & Omega LTD - AO4407 - Power MOSFET.

Just giving you more pictorial info on what you are looking for.

The FDS6679, and the AO4407 are now OBSOLETE.
That is OK. There are cross reference match examples, given,

http://www.mouser.com/ProductDetail/Fairchild-Semiconductor/FDS6679AZ/?qs=sGAEpiMZZMshyDBzk1%2fWi1qxDdW%2fXBi2qgMuZEfLVO4%3d

Cost? $1.01 USD

http://www.mouser.com/ProductDetail/Diodes-Inc/DMP3020LSS-13/?qs=%2fha2pyFadujguNNSgppBRqXbOxXLwzGsZm9SWxz1EqWpzoSJOpHpWA%3d%3d

Cost? 78 Cents USD

No? Not good enough? Part number/s are burned off?

I'd go down to the nearest Toshiba authorized repair shop, and talk to the head tech. Tell the person you just need to know the part number of those P.MOSFET's, and how much would it cost to find out?

Ask him/her about the Solid Polymer Capacitors too.
(Aluminum 'can' with Red mark on one side; on Top)

Also ask what Capacitance, and Voltage are used for the Multi-Layer Ceramic Capacitors.
(MLCC)

Those are SMD/SMT, just like the P.MOSFET's.
(Surface Mount Device/Surface Mount Technology)

This is an example of one. I'm going to use 4.7uF (Microfarad), and 16 Volts; for the example,

http://www.mouser.com/ProductDetail/TDK/C2012X7R1C475K-SOFT/?qs=sGAEpiMZZMvQvaS66kI3TnqvLXG4yRLT5fJp9Bq6PjE%3d

Regards,
joecoolvette

Schematic diagram for toshiba Satellite Pro L300 http://www.bing.com/images/search?q=schematic+diagram+for+toshiba+Satellite+Pro+L300&qpvt=schematic+diagram+for+toshiba+Satellite+Pro+L300&FORM=IGRE