My Toshiba Equium L300- 146 [strike]system unit[/strike] laptop only has a 1GB 2R×16 PC2-5300S-555-12hynix card in the back and the front slot is empty..is this enough to run my lap top or do i have to replace a missing card as my lap top will not turn on ?...thank you gor any help and advice you can give me to resolve this problem.