Behind the mechanical keyboard is a sheet of frosted plastic which embedded within it are a collection of tiny LED’s which hopefully illuminate the sheet evenly that then passes the light outwards thru holes in the mechanical keyboard into the discrete key and the letter or symbols are lit.
So … a liquid spill can affect this sheet with a deposit of material which light is prevented from exiting outwards. It’s also possible one or more LED’s have failed as well.
So to gain access to the sheet one needs to remove the logic board as we don’t have a guide for you system you’ll need to follow as best as you can this guide [guide|153644] there are differences but it’s very close to the same process.
[image|3598482]
Now looking at the upper case we see a sizable black sheet covering the keyboard area, carefully unglue the edge and the keyboard cable which passes through it, you should then be able to lift it out this assembly this is the backlight unit. If you just had a spill then cleaning the other side should remove what is blocking of the light, otherwise you’ll need to replace it.
This is where things get costly! As Apple doesn’t offer the sheet as a replaceable SKU. You might find it offered as a used part where someone has parted out a system, otherwise it’s a new upper case assembly! [product|IF123-168]
Behind the mechanical keyboard is a sheet of frosted plastic which embedded within it are a collection of tiny LED’s which hopefully illuminate the sheet evenly that then passes the light outwards thru holes in the mechanical keyboard into the discrete key and the letter or symbols are lit.
So … a liquid spill can affect this sheet with a deposit of material which light is prevented from exiting outwards. It’s also possible one or more LED’s have failed as well.
So to gain access to the sheet one needs to remove the logic board as we don’t have a guide for you system you’ll need to follow as best as you can this guide [guide|153644] there are differences but it’s very close to the same process.
[image|3598482]
Now looking at the upper case we see a sizable black sheet covering the keyboard area, carefully unglue the edge and the keyboard cable which passes through it, you should then be able to lift it out this assembly this is the backlight unit. If you just had a spill then cleaning the other side should remove what is blocking of the light, otherwise you’ll need to replace it.
This is where things get costly! As Apple doesn’t offer the sheet as a replaceable SKU. You might find it offered as a used part where someone has parted out a system, otherwise it’s a new upper case assembly! [product|IF123-168]