I recently upgraded the memory in my fathers Laptop from the original 256Mb sim to a 2Gb sim. No problem there however the Return key and the Cursor keys seem to have stopped working even in the Bios. I have removed the battery and held the power button in for 30secs thinking a reset of the Bios would fix the problem, no luck there they still do not function. I have removed the keys and checked that nothing has been spilled on the keyboard, no problem there ether. I have also checked internally to see if there was any damage to the ribbon cable. Seems fine. To be honest I cant seem to locate the issue and was hoping someone could offer some additional support. Anybody any ideas? Specs: Esystem EI 3101 laptop, Intel Celeron M430 1.73ghz CPU, 2Gb DDR2, Internal 256mb GFX card.