Hi When i am working on my laptop or surfing on internet screen goes black and laptop dont nothing I close it from button switch and when power on again i have 7 beeps .When i closing agian and do power on again its working good.I have motherboard with intergraded gpu.(I think this problem show up when tried to flash bios with custom bios file but after that laptop no power.Then i changed with heatgun the bios chio with other working bios chip from other same motherboard and laptop power on again.)