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I'm using the motherboard from a Dell Inspiron 3847 for this build but I can't figure out the front IO and I can't find instructions for this motherboard anywhere. In the original case the front panel IO is handled by a single cable. Is what I'm trying to do hopeless? Surely there's a way to connect this to my new case.
Searching, I can see some other people asking about "LEDH1" connectors, so I'd guess that it's probably something Dell proprietary. My own past experience has been that Dell doesn't always use standard connectors.
You can probably trace out the leads if you still have the old case and connector. You do that, get a pinout, you can probably rig up your own cable from the old one and splicing wires.
I wouldn't hassle with it myself, would just get a different motherboard, but if the time tradeoff is worth it to you...shrugs
I did some googling. It's more than just a different pin out, you also have to tie some lines together.
At this point I'm determined to use this board as I've already put enough time and money into upgrading that shitass optiplex. It's surprisingly usable with Cachy OS.