I need a external antenna for my toshiba qosmio g 25.

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Here's the procedure:

1. Shutdown the laptop and remove the AC adapter. Disconnect any devices, such as a printer or external DVD-ROM or drive, that are attached to the laptop
2. Remove the laptop battery. Turn the laptop upside down, slide the battery release latch and then pull the battery out of the bay.
3. Unscrew the hard drive cover. Grab the hard drive tab and shift the hard drive to the left to unplug it. Lift the hard drive out of the bay.
4. Unscrew and remove the PCI memory cover, the optical drive cover, and switch cover.
5. Unscrew the two screws that hold the keyboard to the base, these are located in the middle of the rear panel. Flip the laptop over so it is right side up, open and remove the keyboard by using the keyboard release switches located above the keyboard. Next, unplug the Toshiba Qosmio E15-AV101 Fan cable.
6. Close the laptop and turn it over so it is bottom up. Unscrew the display assembly screws located under the laptop screen hinges. Turn the laptop over so it is right side up. Open the laptop and unplug the display assembly cable and disconnect the wireless antenna from the display assembly. Unscrew the display assembly from the laptop base and remove.
7. Unplug the mouse pad cable. Turn the laptop over so the bottom side is up and unscrew the base screws which are located along all four sides of the laptop base. Gently remove the base of the laptop.
8. Turn the laptop over so it is right side up. Unplug the fan cable from the circuit board. Unscrew the screws holding the Toshiba Qosmio E15-AV101 CPU fan assembly to the laptop. Lift the fan assembly out of the laptop.
9. Insert the new Toshiba Qosmio E15-AV101 CPU fan assembly into the lap top. Screw the assembly unit to the lap top and plug the Toshiba Qosmio E15-AV101 CPU cooling fan cable into the circuit board.
10. Reassemble the laptop by repeating the previous steps in reverse order.

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You can try downloading the most recent video drivers from the nvidia web site and installing them.

Other than that you would probably need to contact Toshiba tech support. Based on the information you provided it sounds like your video card is having a hardware issue. It's the reason you see the same lines on both monitors.

This site sells parts for the Toshiba Qosmio G30-140 and other hardware.

The only seller I could find on e-bay.com is this one:
http://cgi.ebay.com/Toshiba-Qosmio-F45-AV411-CD-DVD-RW-Slot-Drive-Burner-/150499593222?pt=PCC_Drives_Storage_Internal&hash=item230a798c06

Alternately, you could buy one here:
http://www.pelltechnology.com/Toshiba-Parts/Toshiba-Portables/Toshiba-Qosmio/Toshiba-Qosmio-F45-Series/Toshiba-Qosmio-F45-AV411/Internal-Parts/

Try opening in safe mode on a reset ,

You may have a hard disk problem / failure or a motherboard problem. It is difficult to diagnose that kind of problem precisely without actually having the machine in hand.

Since you only have one external monitor port, you need to use a video spillter, this will allow you to connect two or more external monitors.

NOTE: This video splitter will only give you duplicated displays. Please check the link below:

http://www.kvm-switches-online.com/video-splitters.html

Thank you!

sure you can buy this part , but change this part is very complicated, find a help support for do that, need open the machine

this indicates you have a bad screen, and if you press around on the back (top) of the computer display the lines will disappear until you take your hands off the area effected, and the screen needs to be replaced.

I too have the same problem any ideas from anyone would help