Acer Aspire E1-430 - Windows 8 Prof - Operating System Not Found

Hi, I have a problem with my laptop, it won't boot up due to "Operating System Not Found", but I've used it already for several times but just yesterday it turned out that "Operating System Not Found". I've tried to check whether the hard drive is a problem and slave it to another laptop but it's still working, it will boot up well in another PC. Now I tried to insert a bootable USB drive just to reformat it for it to work again, but still it won't work. My bootable USB drive is detected and can be found in the boot options but if I select the drive for boot it still says "Operating System Not Found". Then I went searching over the net then I found something that might work like having it boot in Legacy BIOS mode, it boot up then but the problem is my display is distorted and fading, there are lines and overlapping display. I don't know what to do now. Does anyone here have an idea on what was going on? Thank you.