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backlight isnt working after taking apart the computer

so 1st things 1st. a few keys on my keyboard stopped working so i wanted to take out the keyboard for cleaning. after following the instructions in this Desmontaje de Laptop HP 15-bs015dx teardown article, I mostly took apart my laptop. i started to remove the motherboard, before deciding that i should check to see if reseating the keyboard ribbon fixed the problem (it did). on the other hand my backlight didnt turn on. i did remove all the ribbons from the mother board and a few screws but put everything back the way it was. any advice?

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Edit: did not actually remove the monitor ribbon (was the only one left before I decided to check the keyboard before going further)

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Edit 2: keyboard isn't working again... Gonna try to see if reseating the ribbon will fix it again

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Hi Elazar,

the disassembling and assembling laptops are easy operations, but you must proceed with caution. You have to be very carefully, because you can damage your laptop easily and you don't have to know about it.

First

This issue can be caused by damaged flex cable or the connector (both sides) - You can measure continuity on the cable by continuity test on your multimeter. If it’s ok, please measure continuity from the cable to the connector and opposite.

Second

Disassembly your laptop again and check if all cables are connected and working properly - they must be placed as original.

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How exactly would I know which pin lines up?

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The flex cable is a serial interface. The pinouts are the same as at the beginning. Follow the marker (one of the wires is coloured), it's pin 1

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Elazar Orenbuch será eternamente grato(a).
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