Picked up a nexus 7 2012 to repair. tried to flash ended up screwing the bootloader. Not a issue bought a new board for it and swapped it out. With the new board it wont boot up unless you slightly press on the tegra3 chip and when it does it is mostly normal but all brown color seems to be missing. any ideas? ill post some photos later.. about to give up this thing is pissing me off.