Despite my efforts to create a perfect WiFi coverage in our house using 3 Unifi access points I had some dead spots about in the center of them, only on Samsung devices. Searching the internet for a possible cause didn’t bring me any satisfying answers.
Fortunately I came up with the answer myself, which I want to share with the world.

While soldering you can't have too many hands. Just in case you burn one of them...
No honestly, you will soon run out of hands to hold your soldering iron, your solder and the objects you want to solder together. Here are a few tips to give yourself an extra hand.

Here's a useful tip if your Samsung TV refuses to start up. Occasionally it works just fine for hours on end, but most of the time it doesn't want to start up.
There's still a good chance of recovery, if it only flashes the power LED a couple of times when you try to switch it on.

You can't have too many multimeters. I have two Fluke 8020A's with broken displays. Let's go and fix them!

There's one thing you are never short of when you have plenty of relatives, repairs.
A nephew of mine came with this Samsung S3 phone, which didn't start up. It showed the splash screen and it turned off again, repeatedly.
The question was whether I could fix it. Easy!

Do you have some failing battery packs for your power drill? Here's how to make one good battery pack from 2 packs containing some lazy cells.

It started turning off on its own initiative. Until it started turning itself off during normal use, or while pressing the outer rim around the screen.
Fortunately this proved to be a very simple fix.

Doesn't your PC answer to your wake-up calls anymore? Probably its power supply is on strike. Here are some tips on how to fix it yourself, if you dare.