I dropped my Toshiba Satellite M30 this morning while it was turned off. The only exterior physical damage I observed was at the right corner of the laptop (where the AC power plug is) which showed strained plastic marks. When I turned on my laptop, everything ran fine EXCEPT for the LCD screen. The colors are all inverted (i.e. the black is white and white is black, etc.). It looks like those negatives on a photo film.
I then proceeded to read some related problems on the internet such as one LCD screen being very white, and some guy suggested resetting the flex cable, but I don’t know how to reset a cable. Another guy suggested that the LCD contacts within the cells may have been dislodged in which case a replacement LCD panel is needed (which sucks). I really hope this problem is repairable without having to buy new expensive parts. I have basic experience with electronics, so a detailed (non-laymen) diagnosis would be preferred. Please advice.
I agree with the guy who recommended reseating the flex cable. That’s the first thing that you should try. Not properly seated video cable can cause all kind of weird problems. The video cable has connectors on both sides. One side is connected to the motherboard, you’ll find this connector under the keyboard. The other side is connected to the back of the LCD screen, it would be necessary to open the laptop display. I would attempt reseating the video cable on the motherboard first, because it’s easier to access.
Here’s a guide I’ve created for taking apart Toshiba Satellite M35 notebook (I guess it’s the same as Satellite M30). Follow steps 8,9,10 and 11 to remove the keyboard. It’s not necessary to disconnect the keyboard from the motherboard, just flip it over and place on the palmrest. You can see the video cable on the step 11; it’s a flat black cable. Make sure it’s plugged all the way down into the connector, reseat it if needed. Test the laptop now. If the problem is fixed, you are done. If not, you’ll have to open up the display assembly and reseat the video cable on the screen.
Here’s a guide for Toshiba Satellite M35X display disassembly, it would be different then Satellite M35 but pretty close. Open it up and reseat the video cable on the back of the screen. Take a look at the step 7, it shows the video cable connector. Test it again.
If you still experience the same video issue, then apparently the screen has been damaged and you’ll have to replace the screen.