I didn't want to step on Annas' electronics thread. I have a Toshiba satellite L655D-S5050 that quit working just after the warranty expired. The shop said the motherboard was bad. I was playing around on ebay and found all kinds of motherboards and all kinds of prices. I took mine apart got the motherboard out and went back to ebay. There is a number embossed on the board just below what I think is the memory card. I have found some boards with similar numbers, none that are the same. The pictures look just like mine. How do I tell which ones will work. I readily admit that I am way over my head here, but figured that a little education might be worth time it took to take it apart. Here is a picture.