I'm the original owner of a 2012 Mac mini i7 2.3 that has developed a power issue. Absolutely nothing happens when I press the power button. There are no beeps and the fan does not move. I took it to Apple and they suggested replacing the power supply. I swapped the power supply myself and it did not resolve the problem. In fact, the original power supply and the replacement have identical voltage output per a multimeter. Apple quoted me about $300 to replace the logic board. Does this seem worthwhile or should I chuck it in the bin?