Question about E-Machines T2542 PC Desktop

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Power switch (E-Machines T2542) is broken. Will not turn on again after turning off. Have to leave computer on all the time because afraid will not be able to turn it on again if I turn it off. Anyone know where to get replacement switch?

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I don't have the same model as you, but I think you're having the same issue as me. I'm assuming the switch on the front has physically "stuck" in the case? First of all, restart your computer and enter the BIOS. This is usually done by hitting the Del, F1, or F2 key as it is starting up. It may even tell you which key to press as it is starting. Once you're in, look around for the setting which governs what the computer should do when power is lost. Adjust the setting so the computer switches itself back on when power is restored, then hit F10 to save your settings and exit. If someone shuts the computer off after this, you can get it back on by switching it off at the wall for 5 minutes and then switching it back on. The PC will register power loss/restoration and hopefully come on on its own __ As for an actual solution, I can't find spare parts. In the end, I cut a hole in the front of the case and wired my own switch in. If you decide to go this route, it is better to use a biased switch ( http://en.wikipedia.org/wiki/Switch#Biased_switches ) as it mimics the function of the original. You might be able to temporarily fix the stuck switch by taking off the little silver cover with the 'e' on, then using a paperclip, pencil, or screwdriver (all of which i have used before) to pull it back into its original position. Hope this helps

Posted on Jun 15, 2009

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1 Answer

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Probably a dead power-supply.
Take the computer to any computer-store,
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I would suggest this generic Power On switch,

1) http://www.directron.com/atxswitch.html,

and the Red, and Black twisted pair of wires go to the Power On switch.

Your statement of ,"....don't know which of the colored pairs of wires go.....", leads me to believe you may have all of the Front Panel wires disconnected.

How about information as to where ALL the Front Panel wires go?
(Provided I have correctly interpreted your statement)

Back in the time that the eMachines T2542 was made, TriGem was the motherboard manufacturer.

The Model Name of the motherboard is Imperial, and the Model Number of the motherboard, could have been one of four variations offered.

Model Name: Imperial
Model numbers could be G, GL, GV, or GLVE
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ALL four variations used the same Front Panel header.
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I would like you to view this page,

http://www.e4allupgraders.info/dir1/ecase/support/front_panel_header_support.shtml

Scroll down to the heading -
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B) Pins 5 and 6 are for the HarDDrive activity LED light.
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C) Pins 7 and 8 are for the Power On switch

D) I wouldn't connect any wires to Pins 9 and 10, nor Pins 11 and 12

E) Pins 14 and 15 are for the Reset switch. (The button you press to restart your computer.
If the T2542 doesn't have a Reset switch, don't worry about it. There are many other ways to restart your computer)

F) Pins 17 18, and 20 are for an internal speaker.
This speaker is used for BIOS Beep Codes.

In the chart to the right, you will see GRD used many times.
GRD stands for Ground.
ANY Black wire in the twisted pair of wires, is a Ground wire.

Most of the eMachines I have worked on, use a Red, and Black pair of twisted wires for the Power On switch.
I could be mistaken on the T2542.

Best method, is to follow the color code of the wires that come from Pins 7 and 8, and be sure.

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In order for us to assess possible drivers that are available for the eMachines T-Series T2542, please download the trial of Driver Detective and run it to ensure a more accurate list of drivers for your computer with less chance of error.
http://www.drivershq.com/Drivers/eMachines/T-Series/T2542/22605/22647/22688/Drivers.aspx

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