you have to remove NEC-tokin capacitor which is located bottom of the processor toshiba notebook follow the link below for image of the capacitor. You have to become the member of site by creating the userid . i to have same problem i change capacitor with four 330 uf tantalum capacitor. Thanks http://www.techenclave.com/topic/503953-toshiba-satellite-l300-problem/page__p__1624272__hl__nec-tokin__fromsearch__1#entry1624272