123a2fe61539
tech



Hello Wayne - 

CA>>> It's an HP about 5 years old with AFAIK a micro switch
CA>>> that 'signals' the power supply to turn ON/OFF. 

WC>> Hmm, I know the H.P. uses a momentary contact on it's
WC>> computers but this doesn't make sense to me on the monitor. 

WC>> I'd think it likely a simple double pole double throw
WC>> power switch. Mind you I've never even seen an H.P.
WC>> monitor. 

CA>> I'm going by the sound and 'light' feel to the switch that
CA>> it isn't managing higher voltages directly. 

WC> Some of the DPDT switches on a couple of my monitors have
WC> light feels and make no sound. There's a mechanism in some
WC> rocker switches and push button on off switches that can
WC> account for that feel. 

OK I'll consider my assumption as invalid. :-\ 

CA>>> Any suggestions as to how I can test my theory and/or get
CA>>> the monitor to turn on? 

WC>> Well first you've got to open the monitor case and in my
WC>> experience this requires a long reach philips screwdriver.
WC>> I hacked half the handle from a regular one to reach. 

WC>> If you're not handy with electronics or familiar with
WC>> power line level voltages keep your hands outta there and
WC>> perhaps consult someone who is comfortable with line level
WC>> voltage. My opinion, YMMV. 

CA>> I bread boarded a few transistor circuits when I was
CA>> younger and can manage a soldering iron. I could read
CA>> transistor schematics and even spot the various sub
CA>> assemblys at one time. I guess I'm not 'handy' but am
CA>> experienced (somewhat). 

CA>> I will try adding a jumper to the switch. 

WC> Somewhat experienced won't cut it here as your dealing with
WC> line level voltages. If the power leads route from the
WC> power jack to the switch that's clear. Mistakes can lead to
WC> anything from electricution, blown fuses, a pyrotechnic
WC> electrical display, hot chasis monitor. 

WC> OTOH it could be a low voltage switch controls the power
WC> but it's not in my experience done this way nor do
WC> manufacturers add extras that add to the cost while adding
WC> nothing to functionality. Beware. 

I won't be 'fiddling' with the switch with the power cord
plugged into the house current. I will attempt to detect the AC
using a multimeter then apply jumper(s) with the power cord
unplugged and then apply power after that. Wish me luck. :-) 

>
>        ,                          ,
>      o/      Charles.Angelich      \o       ,
>       __o/
>     / >          USA, MI           < \   __\__
 

--- * ATP/16bit 2.31 * 
... DOS the Ghost in the Machine! http://www.devedia.com/dosghost/