Chosen Solution
I accidentally locked myself out with a Bios password. Dissassembled carefullybhopong to find a CMOS battery to reset but didn’t. Now, the screen doesn’t function as something was bumped (but keyboard works, all ports work- external display is fine etc.)
Any tips on fixing this? How much would it cost if I’m lazy? Im sure a lead to the display is just astray. No trauma. Update (10/15/2020) Being $200 when I bought it, I’m not looking to spend $100 to repair something simple :(
Hi, Try shining a torch at an angle close to the laptop screen and check if there are any images to be seen when the laptop is on. They will be very faint if they are there so trying this in a darkened room may help to see them. Don’t forget that you may have to toggle the display from external back to “laptop only“or “both” using the keyboard. (Fn + F8) Also Fn +F7 turns the display on and off so try that as well If there are images seen when using a torch, then there is a backlight problem. Did you disconnect the battery cable from the motherboard when the laptop was open and you were looking for the CMOS battery? If not then perhaps you may have accidentally touched something that you shouldn’t have touched. There is always power available at some points on a laptop motherboard when the laptop is turned off. The power button is not a power isolating button. It merely signals the BIOS to turn the laptop on and off etc. Think of the laptop as being in an extremely low power state rather than being totally switched off. What is the motherboard’s “board number"? The board number is printed on the motherboard itself. Knowing the board number may hopefully make it easier to find the schematics for the motherboard which will help to find the components on the motherboard that supply the power for the display backlights, so that they can be checked. Search online for (insert motherboard board number) schematics If there are no images to be seen on the laptop screen when using a torch then open the laptop and disconnect the battery cable from the motherboard and then check that the video cable is securely connected to the motherboard
