This is pretty old but I'm using this PSU every now and then as well.
Some issues:
* The fan blows in air through the metal enclosure and there's no filter, it will throw corroded metal dust onto the PCB (the metal enclosure will corrode over time in that area). In humid areas this will kill the Vias on the PCB (it took 3 years to kill the Vias here). During summer time we have around 65% humidity here.
-> Workaround conformal coating on the PCB & on the enclosure of the power supply, add solder to the PCB vias in the affected areas (I was able to recover it that way)
++ Issue that lead to checking the PSU, channel number two started to display wrong values, when setting channel two to 5V it showed 12V and also output 12V.
* The Freescale Microprocessor is powered from an undersized LDO, this one should be replaced with a switching regulator.
-> Caution when disassembling the PSU and powering it on the regulator depends on the airflow, if it's not getting cooled it can even burn one of those fuses (it did it here). When I replaced the regulator with a switching regulator, that switching regulator was also faulty and dumped 12V instead of 5V to the front panel which burned the processor, I was able to recover the system by replacing the BGA and one 249 Ohm resistor on the board.
I got a dark screen when the BGA wasn't soldered properly, and possibly when the flatflex cable to the frontpanel isn't installed properly.
My PSU works properly again after servicing it.