Announcement

Collapse
No announcement yet.

Which fuse is responsible for backlight on Lenovo Thinkpad T14 Gen 3

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    Which fuse is responsible for backlight on Lenovo Thinkpad T14 Gen 3

    I upgraded display from HD to UHD recently, and I think I did everything right, battery was disabled in BIOS, and removed, yet the screen has no backlight. Both the old and new display behave the same way. I checked the motherboard and I see the fv1 fuse, and a fv2 spot for a fuse, but it's missing. Does anyone have any information on whether fv2 is responsible for backlight, or why it's missing? There's a schematic posted somewhere on this forum, but I can't view it as I don't have the hardware right now, since the laptop screen is broken and I run Linux.

    Also from further search I found that there are possibly more fuses on the back side of the motherboard, once again any suggestions would be appreciated.

    I have a soldering iron and hot air station, but I bought it recently. I soldered over the fv1 fuse and then nothing happens when I plug it in, after removing the solder it comes back on.

    Also should I buy flux 😅.

    #2
    Link to schematics https://www.badcaps.net/forum/troubl...nm-e441-rev1-0

    Comment


      #3
      I was able to check the schematics using Flexbv free version, and it seems like FV2 is responsible for touch. This makes sense, because touch was not working when I was testing the laptop either. Let me know if you have any additional thoughts, I will try to update tomorrow.

      Comment


        #4
        Hey, having a similar issue after replacing my screen on t14 gen 3 Intel 21ah. unsure if its the fuse / if there is a fuse. Is yours intel or amd?
        Those schematics don't quite seem to line up with my board.. going to try a new display cable in a few days. My new display may also just be DOA.

        Comment

        Working...
        X