For some time now my Logitech G15 V1 gaming keyboard backlight started to flicker and was a lot dimmer than it used to be. I felt it was a good time to do some trouble shooting and see if I could fix the problem.
Disassembly took a bit of time. There are lost of screws and a couple of hidden clips that you have to carefully disengage if you don't want to break them off. Then there are a couple of ribbon connectors which you have to unplug. These are really fragile and one wrong movement and you can throw the keyboard away. After disassembly this is what I found.
Notice that the third LED from the left doesn't work. After a quick look in my electronic supplies I found my collection of 3mm blue diffused LEDs left over from my 8x8x8 LED cube. I decided to not just swap out the damaged LED but all of them. They where all getting old and could cause an uneven dispersion of light because of the difference in the LEDs.
What a difference. I think that even though the LEDs are wired in parallel that the moment one LED dies all of them somehow are affected. Hopefully with all the LEDs replaced this problem won't reoccur any time soon.
One of the hardest part of the assembly is connecting the ribbon cable for the LCD screen.. But as you can see everything works as expected and I can finally see the letters on the keyboard again. And after these repairs the flickering of the backlight has disappeared too.
George Timmermans, Research Toolmaker, Software Engineer and Tinkerer