macbook logic broad broken. fixed?

hi, i have a macbook (core duo 1.8G, not core 2 duo). i lent it to my sister b/c i have a work laptop and no longer need the macbook. but after a week, the logic board broke, and my sis said she took it to a store and was quoted $350 to fix it. i am not sure if it is worth fixing anymore.

1) i don't need it as i just use my work laptop now. my sister could just keep using her ibook G4 1.33G 12".
2) my sister said the screen was kind of flickering too but she wasn't sure. i don't know b/c i haven't used it for sometime. i do not want to replace the logic board and then the screen has problem and costs more money.

any idea what to do? thank you very much.

 

thanks. not a spill, but "normal" dead. my sis said she smell something.

if i do sell it for whatever it is worth, is there a way to erase the data on the HD without opening the case? that generation of macbook is a pain to open to take it out.