On and off switch not working - Samsung SyncMaster 940MW 19" LCD Monitor

If it doesn't work with master switch or door switch, it is very common the the motor is out. When pushing either switch check for any type of noise In. The door. If there is no noise and it doesn't sound like it is binding up the replace the master switch on drive door. It is common that the master switch malfunction can cause system to short. Even though the door switch itself is not working, the door switch has to get its voltage from the master switch, so if the master switch is not working nether will the door switch

its usely the switches on the drivers door get a switch bundle from the auto wreckers .i dont deal with this enough to know why when the drivers switch wears out it affects both front windows .very common on chevy canyons. < japanease switches. new switches are insanely priced thats why suggest a auto wrecker switch bundle.

Do the individual door switches work their windows? If so, it would be the driver's side door switch, the master switch, that is bad.
The fact that one window works off the driver switch means that power for the windows is at least getting to the master switch, and that the ground for all power windows is good. If the other door switches work, it is just the master switch, not a wiring problem.

The headlight switch gets power for the headlights from a 50amp fuse.
The fuse powers the headlight switch then the dimmer switch breaks for high and low beams. So if the high beams work, the problem may be with the dimmer switch.
The dimmer switch is made into the turn signal switch on the column. You would need to check the low and high beam circuits at the switch for power.

"...when master switch remove, NO WINDOWS WORK"
This is correct--your master switch is part of the total circuit for all the windows to operate. Assuming the other windows work on their "relative" switches (passenger switch works passenger window etc.), you can assume this; it is not a relay problem. You only have one relay--a bad one would affect all window switches.
First, check your ground wires! Disconnect, clean (abrasively) and reattach)
Second, use a test light (starting at the master switch terminal) to determine if and why it's not getting voltage.

see this steps and fix it. God bless you
Switch If the range vent hood fan and light are not working the switch might be defective. Watch our video on switch testing and test this switch for continuity.

Selector Switch If the range vent hood fan and light are not working the selector switch might be defective. Watch our video on switch testing and test this switch for continuity.

Rotary Switch If the range vent hood fan and light are not working the rotary switch might be defective. Watch our video on switch testing and test this switch for continuity.

Rocker Switch If the range vent hood fan and light are not working the rocker switch might be defective. Watch our video on switch testing and test this switch for continuity.

Switch Kit If the range vent hood fan and light are not working the switch kit might be defective. Watch our video on switch testing and test this switch for continuity.

Micro Switch If the range vent hood fan and light are not working the micro switch might not have continuity. The best way to test the switch is with an Ohm meter. See our switch testing videos for help testing this micro switch.

Thermal Fuse If the range vent hood fan and light are not working the thermal fuse may have blown. It can be tested for continuity. Watch our fuse testing video for more information.

Main Control Board If the range vent hood fan and light are not working the main control board may be defective.

User Control and Display Board If the range vent hood fan and light are not working the user control and display board may be defective. Check other causes before ordering this board.

check the door switch and check if the power comes to the panel. If not the switch is faulty. If the switch works but the panel does not start even after the push switch is working then it is possible that the processor is not working. check the working of the touch pad switch, this is also seen as a regular failure as this is the most used switch.

Your question has two switches and 1 dimmer.
The fan switch works.
The light switch works.
The dimmer does not. What is the dimmer connected to?
Dimmers typically will not control fan speed unless they are rated to do that.
Do you have a 3-way switching where two switches control same light, and you installed the dimmer in place of 3-way switch?

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

It has to be the switch or the wiring, right? So pull out the switch and probe the back with a volt meter to see if power is coming out of the switch. If yes, trace the wires to the doors.

the drivers door switch is most likely bad, they get used the most and wear out first, the connector on the back of switch may have come loose and not making good electrical contact, remove switch and check connector and if still not working need new switch, the windows are all on same circuit and either all work or none work so not fuse. extremely rare is a short in wired but not likely.