killed my motherboard, looking to buy another for this laptop

jqy

Estimable
Sep 13, 2015
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4,510
have a toshiba e45t b4300, and recently i killed it by trying to charge a phone battery with it via usb cable, wrong wires hooked to the battery killed my mobo
now the model number is E45t B4300, i have been going through ebay and i find these weird offers and i just don't trust it, but i found this
http://www.ascendtech.us/toshiba-satellite-e45t-s40t-motherboard_i_ltpmbh000079380.aspx

question time
1-question here is, do you only count on the computer reference model number which in my case is e45t b4300. and it's listed in the product description.

2- second, the cpu is soldered to the motherboard, can it be removed from the old one and replaced to this new motherboard im getting? or am i going to have to buy another cpu???

3- what are the chances of other components being fried along with the motherboard, no smoke came out, the screen went off like if you hit the sleep button. everything seemed to shutdown when the motherboard failed.

thank you.