MacBook with folder question mark after Motherboard replacement

i have a 2009 macbook that was working a while back but then this morning i tried to turn it on but it showed a folder with a question mark, i had replaced motherboard cause when i went to fix it they said to replace motherboard, they had torn the cable of the hdd soo i had to replace that aswell, same issue acquired after replacing everything a folder with a question mark, tried to download el capitan into a usb drive to reinstall it into my macbook but disk utility wasnt even working, the only thing was showing is a folder with a question mark, any help would be great.

[Re-Titled by Moderator]