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Hacking a power button on a PC

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mrracer:
Unfortunately I can't use the front power button as the Dell uses a proprietary front power panel. I can't hack it because there are no wires visible and uses a signal cable or ribbon to connect

SirPeale:

--- Quote from: Pik4chu on August 19, 2005, 12:43:21 am ---The power-on jumper for ATX motherboards (the current standard, the one with the large 20pin molex) is done by shorting the green wire with ANY ground (black) wire.
--- End quote ---

The shorting the pins trick may or may not work.  With some motherboards, when you short those pins, it trips the POWER_ON_GOOD and it won't boot.  My capacitor trick works every time.

mrracer:
Does that only work if I have the PWR-ON after PWR-FAIL option on? Also does that mean I have to shutdown the operating system everytime I want to turn off the cab or can I use a arcade style button with a microswitch or a leaf switch to turn your PC on or off? Now does the capacitor go on the same pin number as mentioned above on the 20 pin matrox cable I have. Which would mean I only need one capacitor, or am I mistaken. I still trying to understand this, since one pin is negative and one is positive were does the negative pin go and were does the positive one go, on the green PS ON wire (maybe the negative pin on the black common wire (any) and one pin "positive" on the green PS ON wire?) Please advise...

Pik4chu:

--- Quote from: Peale on August 19, 2005, 08:12:20 am ---
--- Quote from: Pik4chu on August 19, 2005, 12:43:21 am ---The power-on jumper for ATX motherboards (the current standard, the one with the large 20pin molex) is done by shorting the green wire with ANY ground (black) wire.
--- End quote ---

The shorting the pins trick may or may not work.
--- End quote ---

mrracer:
Hey Pik4chu, I appreciate the response. I cracked the Dell open (pretty difficult to take out the plastic casing I might add, ended up braking one of the tabs off) and finally got to the power button, unfortunately in this particular model I guess there are no wires to trace to the mobo it's soldered on the a board and the only thing I can trace back are the 2 ribbons attached too it. Trust me I much take that route much simpler for me. But undoable... That's why I've been looking at your other alternative, which I'm ready to try but I just want to make sure i do it right. If I understand you correctly I would run one wire from the green wire to my push button and a common black wire to the push button as well, is this correct. Sorry I wound repetitive, but like I mentioned before I don't want to fry the mobo since this is my first time actually trying something like this. Thanks again.

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