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T530 backlight fuse location?

T430 and later, plus T530 and later series specific matters only
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T530 backlight fuse location?

#1 Post by moofish2842 » Wed Oct 02, 2019 6:46 pm

Recently, after replacing the screen with the battery installed on my t530, the backlight hasn't been working (tested with multiple working screens). I was able to figure out it is likely the backlight fuse and used this post: viewtopic.php?t=126143 to try to fix the problem. I couldn't figure out what fuse they actually meant though, and to make it worse the layout is different on my t530. As shown in this picture: https://imgur.com/a/oQ3y2X0 I tried bridging a couple of fuses that I guessed could be it, but the problem has not been fixed.
Did I bridge the wrong fuses? Do I need a new mobo? I really need this to work as it is kind of my main machine (but I will survive without it for a while).
W541 - i7-4940mx, 8gb RAM, Quadro k2100m
T530 - i7-3632qm, 8gb RAM, NVS 5400M; motherboard upgrade from t520.
T430 - i5-3320m, 4gb
T430s - i7-3520m, 8gb
Helix 1st Gen - i5-3337u 4gb
Other experience with X230t and t540p
I am 15 years old

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Re: T530 backlight fuse location?

#2 Post by RealBlackStuff » Thu Oct 03, 2019 1:19 am

On T530 the backlight fuse is F3, an SMD/surface mount fuse, 32V, 3A, fast.
Its size varies but is either 0402/1005 or (most likely) 0603/1608 (imperial/metric).
Location near the LCD-connector on the motherboard.
Measure fuses with a multimeter, set for Continuity.

Remove whatever mess you made around the F7 fuse.

When you get the (tiny) new fuse, piggyback-solder it on top of the old one.
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