Q: white screen no boot up

Hello

here is an extensive list of what the problem is and what i have done i need help with this one

NO COMMANDS WORK AT ALL ON THE COMPUTER SOME COME UP WITH THE APPLE LOGO

when the air is turned on i get the white screen nothing else

all commands and reinstall have been tried either get nothing or the apple logo

when i try to use an external usb i get

ifiboot loaded from device acpi pnp0a03 0 / pci 1fi2/sata 0 0 /hd part2 sigb3b7288c-2b22-47bd-b696-2f2d2f5b2b96 boot file path : \system\libary/coreservices\bootefi  ..loading kernel cache file 'system\library\caches\com.apple.kext.caches\startup\kernelcache'  .............

and thats all the life i get from it

when i disconnect the ssd nothing works white screen

when i disconnect the battery nothing works white screen

Any ideas as i am stumped

thanks