I was facing similar problem. After turn-on there was black screen without screen backlight. Pressing "D" + "PowerBtn" runs colored display test, CPU fan running at full speed. I tried to upload firmware from this topic. CPU fan becomes turned off but the screen still black. I tried to re-upload "original" backup-ed firmware and fortunately screen becomes alive. I was able to run bios and diagnostic tests. There is a difference in hash sums between firmware from this topic and mine. I leave it here just in case....