I have an Acer Aspire 1362 WLC (1994) and wish to replace the processor AMD Sempron 2800+ 800 Mhz with an AMD Sempron 2800+ 1.6 GHz in order to replace Windows XP with Windows 7. The problem is that I can not take the unit apart to get access to the processor. I have loosen 13 screws at the bottom plus another four under the batterycompartment. It seems to get stuck at the upper end where the hinges to the screen are. Please tell how to proceed to get access to the processor. Best regds Evo Larsson