Hi, also have had missing backlight on some laptop panels which are very similar.
Most computer shops just change the panel at this point because it is either bad LEDs, bad driver IC, bad fuse on the panel or a combination of all three.
I've fixed one or two but usually it pretty obvious that some of the diodes are weak or burned out.
Re. your ipad, I would try and get some 40 gauge (ultra thin) tin/lead solder and the thinnest bit you can find.
A thermally controlled iron that can handle at least 360C would be handy because the solder on these is RoHS and a pain to deal with especially on 0402 SMDs or smaller.
The thin copper strands from a piece of welding cable or for that matter headphone wire might be thin enough to get a good contact.
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If you are really stuck I can try and send some, have a good stock here that gets used for repairs (once did a chip transplant on a broken pendrive!)
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Also worth inspecting the board in case a fragment of glass or debris got into the connector.
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Also worth inspecting the board in case a fragment of glass or debris got into the connector or severed traces near it, the backlight trace is only one pin on these.
Hi, also have had missing backlight on some laptop panels which are very similar.
Most computer shops just change the panel at this point because it is either bad LEDs, bad driver IC, bad fuse on the panel or a combination of all three.
I've fixed one or two but usually it pretty obvious that some of the diodes are weak or burned out.
Re. your ipad, I would try and get some 40 gauge (ultra thin) tin/lead solder and the thinnest bit you can find.
A thermally controlled iron that can handle at least 360C would be handy because the solder on these is RoHS and a pain to deal with especially on 0402 SMDs or smaller.
The thin copper strands from a piece of welding cable or for that matter headphone wire might be thin enough to get a good contact.
Also worth inspecting the board in case a fragment of glass or debris got into the connector.