Toshiba l355d laptop. the screen works then goes blank with the lights are solid. no response via keyboard or mouse

a couple of things. on the computer lower the res to 16 bit. 800 x 600. 60 hz. on the tv look for input and change it. or look for video on the remote control. also look in the owners manual if you have it. also since you have a blank screen try moving the mouse off the screen and to the right and to the left. you may have it set to extended instead of copy.

A blacked-out screen doesn't necessarily indicate a broken monitor.
If the computer has run out of charge or is in hibernation or sleep mode, if the screen is too dark, or if the display cable has come disconnected from the motherboard, the screen may appear black or fail to turn on. To fix a blacked-out laptop screen, troubleshoot the screen settings, check the LCD connector and see if the computer is awake and receiving power.
Touch the touchpad or move the external mouse to see if the computer is asleep or hibernating. If the computer fails to respond, press "Enter" on the keyboard. Press the power button if the screen remains black. Confirm that the power indicator light, found at the front of the computer or above the keyboard, is glowing solid green or blue. Confirm that the power adapter is plugged into the computer and into a wall outlet. Confirm that battery indicator light is glowing solid green or blue. Hold down the "Fn" key. Press the up-arrow to see if the screen brightness increases.
Some computers also use the "F6" or "F7" keys to increase screen brightness. Hold down the power button for 10 seconds to turn off the laptop.
Remove the AC adapter from the computer, close the screen, and then turn the PC over. Slide the battery latch to eject the battery. Pull the battery out of its compartment. Turn the computer back over, open the lid, and insert the edge of a flathead screwdriver or other flat, solid object beneath the bezel above the keyboard. Wedge the edge of the keyboard bezel off of the top cover.
Work your way along the edge of the keyboard bezel to loosen it.
Pull the bezel off the laptop. Trace the cable coming from the laptop screen to the connector found beneath the bezel.

Reconnect the display cable to the motherboard if the cable has come loose from the connector.
Line up the tabs on the bezel with the slots along the top of the keyboard. Insert the right edge of the bezel into the gap above the keyboard, and then push the bezel back in place. Turn the computer back on.

If the laptop screen is still blacked out, connect an external monitor to the video port on the side of the PC to confirm that the video card isn't defective.

If the external monitor works, the LCD screen could be broken.
If the monitor doesn't work, the motherboard or video card might need to be replaced. Hope this helps.

Try to remove the memory and clean..
place it back.

if not refix all the connections. or try change the monitor maybe monitor is dead.

Push the power button and wait for 10 seconds.

That Floppy Strip connects the touch pad to the motherboard.
Remove the top assembly againg and look specifically at the base of the touch pad, there is a connector that takes the cable. The other end connctes to the motherboard.
If you put it in the wrong way up, it will not damage, just won't work.
Have fun!!

Please connect a USB Mouse and keyboard then power on your laptop it will boot your win xp then re enable your touchpad by going to device manager. It will work.

maybe u forgot to plug the strip of mouse
and revert back to me

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

Here are some easy things that can sometimes resolve this problem:
1) Sometimes there can be a static buildup on the mother board. Power off, remove the battery, remove the power cord and hold the power button in the on position for at least 30 seconds.
2) If that didn't work- Power down, remove the battery, remove the Hard Drive and memory modules and reinsert them. Try to power back up
If these things don't work, get back to me for some more ideas.
Ron

This device is monitored via a kind of strain gauge; that is why it does not seem to move; it does move but not noticeably.
If it is no longer responsive in one or the other direction, I would call it dead.
I have never seen one of these loose but I would expect to find a small sealed housing that has an equally small, multicontact connector attached.
If you are unlucky, Toshiba may have attached this to the keyboard's platform requiring the replacement of it as a unit.

On most laptops, the keyboard is fairly easy to remove and if you can accomplish that, restoring the truncated joy stick is probably not difficult.
Sorry I cannot give you detailed instructions for disassembly.