Need to bypass desktop power switch

Discussion in 'Computer Help' started by donnonm, Oct 8, 2007.

  1. donnonm

    donnonm Junior Member

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    I have an HP Pavilion 8750C that is now missing the on/off power switch, which broke.
    I tried bypassing it by joining the the leads into the switch. The PC powers up for 2-3 seconds then shuts off.
    Tried a number of times, same result.

    Might anyone know a fix for this? A search for a switch on the HP site was no help.

    PC specifics are:
    SYSTEM NUMBER: P1334A
    SERIAL NUMBER: US02205080
    Support ID: 15-1334-0000-0220-5080
    HW BOM: 101 SW BOM: 51

    Thanks! Don
     
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  3. Laputa

    Laputa Golden Member

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    You can try to rewire the reset switch and use that if there is any. You are probably better off by soldier 2 wires and do a hot jump the on off circuit if you must. If you connect the switch for more than 2-3 sectors, it will power the thing the board off regardless. All it needs is to get a connection for less than 1/100 of a second and it should power on.
     
  4. nineball9

    nineball9 Senior member

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    It's a momentary-on switch, so if "tried bypassing it by joining the leads into the switch" means you just shorted the switch, you need to disconnect the switch wires. A momentary-on switch only makes a connection when pressed and then returns to its normal-off connection.

    You can jury rig your system for now by touching the 2 switch wires together for a moment and then disconnecting them. A single pole, normally-off, momentary-on replacement switch is what you need. Shorting the switch will simply turn off the system (varies by mobo) as you have discovered already.

     
  5. imported_Baloo

    imported_Baloo Golden Member

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    Ditto

    Just plug the reset switch in place of the power switch. it's the same type of switch.
     
  6. donnonm

    donnonm Junior Member

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    You guys are the greatest !

    Nineball, touching the switch wires together for a moment worked perfectly.
    I'll get the switch you mentioned for a permanent fix.

    Thanks again! Don