Re: No Power Problem

I'll place my bet on the power supply. Power switches rarely fail. Best way to
find out is to test the motherboard with another power supply. The power supply
need not fit inside the chassis. Simply disconnect ALL devices and motherboard
from the power supply inside, attach the "test" power supply, and see if it
powers up... Ben Myers

On Wed, 28 Dec 2005 18:20:59 GMT, mail@xxxxxxxxxxxx wrote:

>I'm working on an HP Pavilion a614n desktop which will not power up when
>the power button is depressed. Need to identify cause of failure: power
>supply, motherboard, or power switch.
>
>When the power cord is plugged in with everything else disconnected from
>the tower, the green LED on the power supply lights. Upon depressing
>the power button the LED turns off and does not flash. The LED will
>turn on again if the power cord is removed for a few seconds and plugged
>in again.
>
>When the power cord is plugged in with all the power cable connectors
>from the motherboard and internal devices disconnected, the power supply
>LED turns on and remains steady.
>
>I also re-seated the power switch motherboard connector. Can a
>continuity test determine if the switch is OK? If yes what are the
>procedures and expected results? The switch has three twisted pair
>leads: blue-black, red-black, and yellow-black.
>
>Is the power supply fused?
>
>
>Any help appreciated.
>
>Thanks,
>
>Rich

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