The manual shows and labels pins. Normally for ATX case leads white or black are negative connection wires. A small triangle on the plug indicates positive wire.
Looking at manual [German/English download].
Switching makes no difference since lights are separate. End pins reset switch. Power either pins 3 and 4 or 4 and 6. The Diode symbols/led neg and pos. If case includes leds with switches lights will function in proper polarity, other not. No damage done, so trial is indicated.
Basically, the switches do not recgnize polarity, so either way works though most boards show it. LEDS do require polarity matches. the symbol in the manual indicates {if memory serves) the "verticle line" will not pass posive, while the "base of the triangle" will.
Doesn't matter, wrong choice just means led does not work. Just switch pins..
HHD leds I believe require IDE HDD to function.
Power LED may be included in power switch and reqire guessing.
Haven't assembled mine yet, geeks purchase, lol. On the above it appears mind outran typing again, snafu. enjoy [and I had same problem in the day]
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Front Panel Header pin assignments as follows:
Pins 2 + 4 = Power Led
Pins 6 + 8 = Power Switch
Pins 12 + 14 = LAN Activity Led
Pins 1 + 3 = HDD Led
Pins 5 + 7 = Reset Switch
Pin 9 = +5v
Pins 11 + 13 = ODD Led
Pin formation is as below with no pin in position 10.
2 4 6 8 10 12 14
1 3 5 7 9 11 13
You will probably need to extend the Front Panel connector cable to reach the header pins on a replacement motherboard - I did this with 2 x N76HL 10 pin extension cables (male to female) from Maplin.
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