Part selection for possible blown inductor on ASUS GX531-GW-AB76 laptop mobo

[swerg]

Hey everyone,

I'm a novice trying to repair my laptop. The LCD screen has an image, but no LED backlight for the image. It also produces an image when connected to an external monitor.
I have found what I believe to be a blown inductor labeled "L4502" and "120 Ohm" in the schematics (zoomed in image, blue arrow to blown component). I have included an image of the general area of the mobo and an excerpt from the schematics as well.
I am having trouble selecting a replacement component, which I believe to be a 120 Ohm ferrite bead, from the components on this page https://www.mouser.com/c/passive-com...nce=120%20Ohms

1) Have I identified the blown component correctly?
2) Which part should I get?
3) Is a hot air rework station/heat gun and a set of tweezers a good approach for replacing the inductor?

If I am way off, let me know which direction to go, please.

Thank you, everyone
-Swerg

[alexfts20]

Hello, first, you need to verify that the AC_BAT_SYS_LCD_S net is not shorted and has approximately +19V. You can replace this component with just a soldering iron and some flux. L4502 is a FERRITE BEAD (0603) 120OHM 3A, so here is the link to purchase it: https://eu.mouser.com/c/passive-comp...08%20metric%29

[alexfts20]

Hello, first, you need to verify that the AC_BAT_SYS_LCD_S net is not shorted and has approximately +19V. You can replace this component with just a soldering iron and some flux. L4502 is a FERRITE BEAD (0603) 120OHM 3A, so here is the link to purchase it: https://eu.mouser.com/c/passive-comp...08%20metric%29

[swerg]

Thank you, Alex!

I removed the blown bead and shunted the pads with solder since it appeared to be there for noise reduction only and the screen backlight LEDs work again. I will order the part and do a proper repair.

Out of curiosity, what software and schematic source do you use? It looks much easier than the PDF schematics I was using.

Thank you again,
Swerg

[alexfts20]

swerg You're welcome! Glad to hear you got the screen backlight LEDs working again.

As for software, I use nextbv.app for viewing boardview and schematic files. The boardview file I found somewhere on Google.