Question ASUS TUF Gaming FX505DT - Screen backlight not working despite replacing LCD panel.


Jul 18, 2013
Hi everyone.

As the title suggests, the screen backlight on my laptop (ASUS TUF Gaming FX505DT) is no longer working. I've replaced the screen entirely with a (confirmed working) spare, but it didn't fix the issue.

From what I can tell, it's likely to be a fuse on the motherboard that's blown so there's no power getting to the backlight. I haven't been able to find any posts specific to my laptop's motherboard though, so short of stabbing a multimeter into random components I have no idea where to look. There's a lot of conflicting information online, so now I'm paranoid that I've been testing capacitors the entire time so don't want to try jumping lol.

Photos attached, if someone could give some guidance on what I should be testing it would be appreciated.
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