I picked up a 2012 quad core Mac Mini recently. When test booting I noticed the indicator light stayed off throughout. Opening it up, it looked like one of the previous owners had gone through taking it apart less than gently to put an ssd in. So much so that the IR connector had been ripped off the logic board and stayed attached to the cable, minus its pins wedged under the ssd.

Fortunately, replacement connectors were available a couple of miles down the road for a few pounds per strip of ten. The tricky bit was soldering one onto the board as they are tiny. I watched a video on YouTube about how to go about it and I had what was needed minus a digital microscope. The other tricky thing was that there was a standoff just behind the connector pins so getting an iron to them was going to be very difficult. I really could have done with that microscope as the stand off was blocking light from getting to the middle pins so I had to guess when they were done. I just about managed it after first bridging two pins with a bit of solder still attached to the iron tip but a that was easily dealt with. I blotted my copybook by melting one side of the connector when the soldering iron slipped off the rear connecting pin. Not catastrophically such that I would need to redo the repair with a fresh connector but enough so the IR jack needs a bit of friendly encouragement to get into the connector and doesn't sit quite flat on the melted side.

I never expect the first attempt to go right but the test boot showed the light back on and it flickers slowly when sleeping. I don't use the IR side of things so not too concerned whether that works or not.

Fortunately, replacement connectors were available a couple of miles down the road for a few pounds per strip of ten. The tricky bit was soldering one onto the board as they are tiny. I watched a video on YouTube about how to go about it and I had what was needed minus a digital microscope. The other tricky thing was that there was a standoff just behind the connector pins so getting an iron to them was going to be very difficult. I really could have done with that microscope as the stand off was blocking light from getting to the middle pins so I had to guess when they were done. I just about managed it after first bridging two pins with a bit of solder still attached to the iron tip but a that was easily dealt with. I blotted my copybook by melting one side of the connector when the soldering iron slipped off the rear connecting pin. Not catastrophically such that I would need to redo the repair with a fresh connector but enough so the IR jack needs a bit of friendly encouragement to get into the connector and doesn't sit quite flat on the melted side.

I never expect the first attempt to go right but the test boot showed the light back on and it flickers slowly when sleeping. I don't use the IR side of things so not too concerned whether that works or not.