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T430 backlight issue (Fuse F3 appears fine?)

T430-T490, T530-T590 Series
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Seriouslee
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Joined: Tue Feb 09, 2021 11:15 pm
Location: Brighton, England

T430 backlight issue (Fuse F3 appears fine?)

#1 Post by Seriouslee » Mon Jan 17, 2022 1:33 pm

Like some others on this forum, I've broken the backlight on my T430 when attempting to fit an IPS panel to it.
I did this before with a T601 I made and was able to fix it by piggy-back soldering a new fuse over the broken one. However this time when I tested the fuse at F3 (the backlight fuse I'm told) with a multimeter I get a reading from it, so the fuse doesn't appear to be broken.

Is there any other possible cause for this problem?

RealBlackStuff
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Re: T430 backlight issue (Fuse F3 appears fine?)

#2 Post by RealBlackStuff » Mon Jan 17, 2022 1:47 pm

Bad LCD?
Lovely day for a Guinness! (The Real Black Stuff)
IBM: T23 (XP/SP3) - Lenovo: X240, X250, T440p, M900 Tiny (all with W7/SP1)

Seriouslee
Posts: 7
Joined: Tue Feb 09, 2021 11:15 pm
Location: Brighton, England

Re: T430 backlight issue (Fuse F3 appears fine?)

#3 Post by Seriouslee » Mon Jan 17, 2022 1:52 pm

RealBlackStuff wrote:
Mon Jan 17, 2022 1:47 pm
Bad LCD?
Thanks for your reply. It was a FHD lcd with a converter board. I didn't get any visible output to the screen on the new panel (though I could try again with a torch possibly) I replaced it with the old panel when I could tell something had gone wrong and have been using that to test it. I definitely get an output but no backlight.

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Re: T430 backlight issue (Fuse F3 appears fine?)

#4 Post by RealBlackStuff » Tue Jan 18, 2022 1:40 am

Make sure to remove power and battery first, then check all the (LCD) cable connections.
I'm not familiar with this T430 LCD-mod, but I found some info that maybe of use.
https://www.ebay.ie/itm/203206466378 (see the description)
https://www.reddit.com/r/thinkpad/comme ... 0_fhd_mod/
Lovely day for a Guinness! (The Real Black Stuff)
IBM: T23 (XP/SP3) - Lenovo: X240, X250, T440p, M900 Tiny (all with W7/SP1)

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