Ubiquiti Edgeswitch 16 POE Repair!

In this one we repair this POE switch that won't boot when certain ports are connected. CAUTION do not work on mains operated device unless you understand the risks and how to do so safely. Tools I use - Soldering Quick 861DW hot air station Duratech TS-1640 solder iron Multimeter RMM760D - can be found under many name badges Microscope Luzky Zoom 3.5 - 90x simul-focus single boom stand trinocular stereo microscope Camera - Lucky Zoom HD 14MP Oscilloscopes Siglent SDS 1102CML 100MHz 2CH Philips PM 3305 35MHz 2CH Function generastor FY6900 (many brand names) Thermial imaging camera FLIR ONE PRO on android Bench supply Powertech MP-3086 0-30V 3A TL866II PLUS universal EEPROM programmer