ok this one is really strange. currently i have a toshiba A135-S2276 laptop, there is 1.5 G of ram (2 chips 1g n 512M). i tried to replace the 512M chip with a 1G chip to max out the RAM on the laptop. when i put it in the machine does not recognize it, i know its not the slot since it sees the 512M chip. i even place the new chip in by itself and it is seen. this is the second 1G chip i have tried and they were 2 different brands, the last brand is the same as the other 1G chip i have. is there something else that needs to be done to recognize it. i tried going into the bios but there is nothing in the bios with regards to memory......any ides