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Monitor on/off problem

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mrel

Member
Hi
Got this Envision monitor when press on/off switch have to press the switch many time before monitor will turn off,also have same problem to turn on monitor have to press on/off switch many time before monitor will come on.
I notice this switch is push button switch that does not have on/off look , like momentarily type push botton switch .
Is there some kind relay in the circuit when press the switch it make contact to turn on/off?
Enclosed is picture.
 

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dknguyen

Well-Known Member
Most Helpful Member
You would probably hear a relay click if there was one. It probably doesn't even have a solid state switch. It probably just goes into sleep mode instead of actually disconnecting power.
 

rjenkinsgb

Well-Known Member
Most Helpful Member
I'd also think it is just a momentary switch and the PSU main output is started / stopped electronically.

Check the switch with a meter while power is totally isolated.
You may be able to clean it by putting a few drops of isopropyl alcohol in it and working the mechanism for a while..
 

throbscottle

Well-Known Member
Also possible the switches pins have come loose in the PCB. Re-soldering them might help.
Those momentary switches are very cheap to replace, might be better to do that.
 

mrel

Member
This push button switch can not be open is seal switch .
It is momentary type switch push on /push off.
might psu circuit,don't know how that circuit look like.
mrel
 

throbscottle

Well-Known Member
Please clarify, a momentary switch and a push on/push off switch are completely different. But if it's one of the switches on the board at the front in your photo it is very easy to repair, because the fault you describe relates to the switch itself rather than anything it's connected to. To test the theory you can track solder a couple of wires to the pins at the back of the switch and turn the monitor on and off by shorting them together.
 
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