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Power Button Problems
I have an Optiplex 360 that I cannot turn on because of a faulty power button.
I have no idea how to repair this since I cannot get to the power button, which is sandwiched in between the plastic case and a metal cage. There is a small circuit board which a 20 pin cable(XT029) is attached to and runs to the motherboard. I cannot find the pinouts of the cable and was wondering if I can disconnect the cable from the front PCB, would there be a way to manipulate it to turn the PC on. (The audio in/out doesn't work on the front of the computer anyway, and I'd only be losing those USB ports). Any ideas would be appreciated. Darren Harris Staten Island, New York. |
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Power Button Problems
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Power Button Problems
mike wrote:
On 7/30/2018 3:53 PM, wrote: I have an Optiplex 360 that I cannot turn on because of a faulty power button. I have no idea how to repair this since I cannot get to the power button, which is sandwiched in between the plastic case and a metal cage. There is a small circuit board which a 20 pin cable(XT029) is attached to and runs to the motherboard. I cannot find the pinouts of the cable and was wondering if I can disconnect the cable from the front PCB, would there be a way to manipulate it to turn the PC on. I would be thinking about cutting the cable and adding a switch of my own. I think on main mainboards you can start the computer by momentarily connecting two pins with a screwdriver. (The audio in/out doesn't work on the front of the computer anyway, and I'd only be losing those USB ports). Any ideas would be appreciated. Darren Harris Staten Island, New York. optiplex-360_service manual_en-us.pdf Indicates that there is one screw in an obvious, easily reachable position, that releases the board and you can remove it and trace the wire. As I recall, the switch is on the board and there's a plastic rod that actuates it.Â* Maybe that's busted. I'm far to lazy to disassemble mine to pull it out. |
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Power Button Problems
On 7/30/2018 6:34 PM, GlowingBlueMist wrote:
On 7/30/2018 5:53 PM, wrote: I have an Optiplex 360 that I cannot turn on because of a faulty power button. I have no idea how to repair this since I cannot get to the power button, which is sandwiched in between the plastic case and a metal cage. There is a small circuit board which a 20 pin cable(XT029) is attached to and runs to the motherboard. I cannot find the pinouts of the cable and was wondering if I can disconnect the cable from the front PCB, would there be a way to manipulate it to turn the PC on. (The audio in/out doesn't work on the front of the computer anyway, and I'd only be losing those USB ports). Any ideas would be appreciated. Darren Harris Staten Island, New York. Yes you can unplug the two wires from the motherboard that connect to the switch. You could wire up a replacement from any switch that is normally open, like a doorbell button. To test the switch connections on the motherboard first unplug the power switch connector and then momentarily short the two pins together with a screw driver. The motherboard should then power on normally if the switch or wires to the switch is all that is bad. IN the O360, there are several connectors on the board with the power switch. There's a ribbon cable about the size of a floppy cable that connects to the motherboard. Can't do what you suggest without knowing the pinout of that cable... which could be easily determined by removing the one screw that attaches the board to the chassis. The actual switch is some distance from the button and actuated by a rather flimsy plastic linkage. FWIW, the 360 power switch makes a rather loud "click" when you activate it. Absent that click might indicate a stuck switch or broken plastic actuator. I unscrewed the board in a Optiplex 320, same board, but I couldn't see how the power switch actuator attached without removing the floppy. I gave up. |
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Power Button Problems
mike wrote:
On 7/30/2018 6:34 PM, GlowingBlueMist wrote: On 7/30/2018 5:53 PM, wrote: I have an Optiplex 360 that I cannot turn on because of a faulty power button. I have no idea how to repair this since I cannot get to the power button, which is sandwiched in between the plastic case and a metal cage. There is a small circuit board which a 20 pin cable(XT029) is attached to and runs to the motherboard. I cannot find the pinouts of the cable and was wondering if I can disconnect the cable from the front PCB, would there be a way to manipulate it to turn the PC on. (The audio in/out doesn't work on the front of the computer anyway, and I'd only be losing those USB ports). Any ideas would be appreciated. Darren Harris Staten Island, New York. Yes you can unplug the two wires from the motherboard that connect to the switch. You could wire up a replacement from any switch that is normally open, like a doorbell button. To test the switch connections on the motherboard first unplug the power switch connector and then momentarily short the two pins together with a screw driver. The motherboard should then power on normally if the switch or wires to the switch is all that is bad. IN the O360, there are several connectors on the board with the power switch. There's a ribbon cable about the size of a floppy cable that connects to the motherboard. Can't do what you suggest without knowing the pinout of that cable... which could be easily determined by removing the one screw that attaches the board to the chassis. The actual switch is some distance from the button and actuated by a rather flimsy plastic linkage. FWIW, the 360 power switch makes a rather loud "click" when you activate it. Absent that click might indicate a stuck switch or broken plastic actuator. I unscrewed the board in a Optiplex 320, same board, but I couldn't see how the power switch actuator attached without removing the floppy. I gave up. The power button seems to be below the front I/O assembly. Must be hard to get leverage from that far away. (PDF page 82). I can see the one screw you're talking about. https://downloads.dell.com/manuals/a...nual_en-us.pdf Paul |
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