Hi, Travelled business recently on an old A320 (SAA). On those planes, there's a 2-pin outlet next to your seat, for powering 'appliances', with a bicolour LED adjacent that tells whether the power is off (red) or on(green). With the LED green, every time I plugged my computer PSU in, the LED went red and the power stopped within a couple of seconds. I asked the staff what the problem might be, and surprisingly received an explanation - which could be fact or folklore. What they said is that for some reason you need to use a 'thin' adaptor plug, as distinct from a 'round' one. I can't see any obvious difference. Anyway, can anyone explain how these aircraft things work, and what's going on?
BTW, on other occasions, same aircraft type, the seatside power has worked fine.