The fans spinning at maximum is a worry as this suggests that something is overheating. If there are no images then as you say there most probably is a connection problem but it could be at either end, motherboard or LCD panel or perhaps the cable is damaged where it passes through the hinge to get to the panel from the motherboard Mostly in laptops the backlight power is permanently supplied to the LCD panel and it is turned on and off in the panel by a signal from the motherboard on the BL_On wire in the video cable. You would need to know the pinout for the video cable to know which pins the backlight feed is on.
If there are images is then there is a backlight problem. Try this in a darkened room because if there are any images, they will be very faint.
You say that the display emits some sort of light so try shining a torch at an angle close to the laptop screen and check for images when the laptop is on and there is a display on the external monitor. Just trying to eliminate remote possibilities. Are both the fans working, you didn't say?ĭid you try toggling the graphics between integrated and discrete by pressing Fn + F7 just to check?Īlso try operating Fn + F10 to increase the screen brightness.
