Try a reset...
1. Remove battery, and disconnect mains adapter.
2. Press and hold down power ON button for 30secs at least.
3. Put the battery back.
4. Plug in mains adapter then Power ON as normal.
Hello Cobi, this problem is caused by the RAM problem, I know you changed it, but are you sure you used the correct one? ( it's a simple question ). If we use the right one and continue the problem then we should check other RAM connection elements.
This video can help to review the procedure.
Hola Manuel, al parecer cuando regresastes todo a su logar cambiastes algo y ahora es un poco complicado componer este mal funcion, te envio un video que puedes tener una idea de las mediciones que es necesario hacer para determinar el problema, usualmente nosotros podemos ayudar virtualmente cuando se trata de software o configuracion, ya cuando es un asunto mecanico se utilizan metros para hacer mediciones.
To install Windows 7 no need for RAID driver. If you face issues in installing Windows 7 disable RAID in BIOS, install Windows 7 and then install RAID driver.
How To Manually Upgrade from Vista to Windows 7 - Satellite A200/205: