My Toshiba Satellite L750 won't detect an SD card plugged into the built-in SD card reader. When I plug an SD card in, the status LED flashes for a second and then goes out. Windows sometimes plays the hardware insertion sound and shows the SD card in My Computer, but it disappears when the LED stops flashing. I can eventually get Windows to detect the card, but I have to remove and reinsert it several times. I don't like doing that. This happens with two good cards.
This computer also has trouble detecting flash drives properly. Windows will detect the drive, but it shows zero capacity and "..." for the device name in Safely Remove Hardware. I can sometimes get the drive to work, but that requires the same steps as the SD card reader (removing and reinserting the drive several times), and I can't actually safely remove it. It is a little more reliable in the USB port on the left side of the computer, but sometimes I have something plugged into that port because the USB ports on the right are in a really bad location. I did notice that the drive seems to fit really loosely in the right USB ports, so both problems might just be poor quality connectors. If that is the problem, I won't mess with it.
I can post any hardware information later. This computer is running Windows 7.