Question about E-Machines T1742 PC Desktop

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Power supply When i plug in my computer and switch it on, there is nothing happening, the power supply fan is not on. Can I conclude that I have a bad power supply?

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Re: Power supply

for solving the given problme of yours do the following:
1.See that the power connectors and 4 pin connectors are connected properly.
2. Remove the SMPS of that system and connect it to the other PC or if you have multimeter check that 12V is coming into the SMPS.
3. If that system is also not working then you must replace the SMPS with another one.

Let me know if your problem is solved and rate me as FIXYA!

Posted on Apr 24, 2008

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Re: Power supply

I would tri diffrent power cord and and diffrent out lets.  Then replace the power supply and if that doesent work the motherboard would be the cause of the issue.



Posted on Nov 01, 2007

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Computer won't turn on.

There must be a problem with your power switch on your computer casing, or motherboard or power supply.

Detach your power supply and try this, to check if your power supply really works. If the auxiliary fan will turn, your power supply is good
25627818-lfqggqo5gl3n2v4xynrvsb5u-5-0.jpg Testing your power supply and motherboard as seen on photo
25627818-lfqggqo5gl3n2v4xynrvsb5u-5-2.jpg If the cpu cooling fan and power supply did not turn the fan, but you have checked already the power supply that is working then you can conclude that your motherboard is need to be replace. But the power supply and motherboard and working, meaning to say your computer casing need to be replace or try fixing the contact of the switches attach to your casing.

Have a good day.

Apr 04, 2015 | Dell Studio Xps 9100 Desktop Computer

1 Answer

No power to my desktop computer HP A1330N and no green light in the back of the power supply

You replaced power supply and your made sure you plugged everything back into the motherboard snuggly and in it's proper place? If so it might be your motherboard is bad.

Make sure you have the new power supply turned on. Sometimes there's a O/I switch on the back of the power supply. Flip it and try to boot and see what happens. You might have another bad power supply.
If so your motherboard might be burning them out.

Try removing the power cord for 30 seconds and press and hold the power button. After 30 seconds put the power cord back in and press the power button to see what happens.

Do your fans work when you press the power button? Do you hear any fans running?

Mar 23, 2012 | PC Desktops

2 Answers

I have a Dell Dimension 8400 Series desktop that is totally dead. Nothing happens when power button is pushed. Of course it is plugged into a live outlet.

Possibly a bad power supply. Could aslo be bad hardware.

Depeding on how save you are with computers, depends on how far you might want to go with this.

But remove everything one at a time and try to start the computer. Until all you have is a motherboard, processor, fan, and power supply hooked up. If you are still not getting any power, try to swap the power supply first. If that doesnt work then either Motherboard or Processor.

Lastly, swap the power cable out to see if its a bad cable.

May 03, 2011 | Dell Dimension 8400 PC Desktop

1 Answer

I have a hp desktop about 5 years old..few days ago we had a power outage. power came on and off a few times ..i wasnt home but my pc was on when i came home my pc was off and wouldnt start..i try to push...

> bad power supply

Try an ordinary lamp in the wall-socket -- to make sure that a circuit-breaker inside your home has not "tripped", i.e., no power to anything that plugs in.

If there is an on/off switch beside where the power-cord connects to the power-supply, switch it to the "off" ("zero") position.

Unplug the AC cord from the power-supply.

While watching the fan inside the power-supply, and/or watching the fan on top of the CPU, plug-in the AC cord. One of the fans may "twitch", if there is power.

Flip that rocker-switch to the "on" ("one") position, and see if one of the fans "twitches".
Also, look on the motherboard for a small lamp -- it may go on if the AC power-cord is connected,
or may go on when that "back" switch is set to "on".

Try a different power-supply. If still nothing, then it's your motherboard that got "fried".

Nov 11, 2010 | HP Pavillion s7420n PC Desktop

1 Answer

When I press the power button on my Everex computer; nothing happens. It's not getting any juice. Even the cd door won't open. Is there a fuse inside the computer that may have blown? Or is it likely the...


1) Make sure the surge protector your computer is plugged into, has power.

Could be the surge protector isn't any good.
Could be that the wall receptacle the surge protector is plugged into, doesn't have power.

2) Make Sure THE receptacle IN the surge protector, that the computer is plugged into, has power.

I have had more than one surge protector in the past, where just THAT receptacle the computer was plugged into, was bad.

"Hmmm, power on LED light of the surge protector is on.
Monitor, printer, and router plugged into the surge protector have power."

If this holds true for you, remove one of the peripheral's power cables out of it's receptacle in the surge protector, and plug into the receptacle the computer is using.

[A monitor, and a printer are two examples of a Peripheral]

Make sure THAT receptacle has power.

3) Bypass the Power On switch, to see if the problem is the Power On switch, or the Power Supply.

If I were to hazard a guess, my hypothesis would lean towards the Power Supply.
Power Supply failure, is one of the leading causes of computer failure.

Causes for Power Supply failure are generally,

A) Computer is dirty inside, as well as the inside of the Power Supply.

Dirt, dust, hair, carpet deodorizer, you name it, is 'inhaled' by the fans of the computer. No matter how good a housekeeper a person is, the above mentioned 'gunk' is going to get inside.

This 'gunk' is drawn through the computer, and drawn into the Power Supply.

[Computer case fans draw air into the computer from the front, or side.
The air is 'exhaled' through the rear of the computer.

The Power Supply fan draws air into the Power Supply, and pushes air out of the Power Supply, towards the rear of the computer.
Computer case fans in the rear of the computer also push air out.

A typical ATX style of Power Supply,

This 'gunk' coats the cooling components of the computer, and drops the cooling capacity of these components tremendously.

Heat = Wasted Energy

When the cooling components of the Power Supply, (The fan of the Power Supply, and Heatsink's which are used inside), are coated with 'gunk', the Power Supply heats up.

The more heat, the more the Power Supply strains to keep up with the call for power.
Eventually components inside the Power Supply fail, and the Power Supply itself fails.

The inside of the computer, as well as the inside of the Power Supply, should be cleaned on a regular basis as needed.

The computer should be unplugged from power, computer case open, and Anti-Static precautions followed before using the air.

[Q-tips can also be used to help remove a heavy buildup of 'gunk'. The Q-tips are just used to break the 'crust' of the gunk, and the can of compressed air can then remove it]

B) Low quality Power Supply
Low quality components are used inside the Power Supply.

1) Gauge (Size) of wiring is too small.
2) Low quality Electrolytic Capacitors
3) Low quality Rectifier Bridge
4) Low quality MOSFET's

Just to name a few components.
Everex seemed to be a quality manufacturer of pre-built computers, from my research.
They typically used generic Power Supply's that were of average quality.
(Management of the company seems to have been Everex's downfall)

If the Power On switch is bypassed and the Power Supply comes on, the problem is the Power On switch.

[One generic Power On switch that I have found fits many computers, ]

If the Power On switch is bypassed, and the Power Supply does NOT come on, the problem is the Power Supply.

The Power On switch is bypassed, using a jumper wire in the ATX main power cable connector.
[Has nothing to do with the Power On switch directly]

I don't know if your model of Everex computer used a 20-pin, or 24-pin ATX main power cable.

Typical 20-pin ATX main power cable,

Typical 24-pin ATX main power cable,

The Green wire you see present in both ATX main power cables, is the Soft Power On wire.
This is BRIEFLY connected to any Ground wire.
ALL Black wires you see are Ground wires.

The Voltage present is 5 Volts DC.
Two C cell flashlight batteries produce 3 Volts DC.

There is a proper method for doing this procedure, that I would like to outline before you attempt it.
Should you wish to attempt this procedure, please state so in a Comment.

Even with the model number of your Everex desktop computer, I may not be able to give you exact guidance in opening your computer case.

With your patience, and our communicating back, and forth using Comments, I Can guide you in opening the computer case.

[Computer UNPLUGGED from power. Anti-Static precautions followed once the computer case is open]

Jun 28, 2010 | PC Desktops

1 Answer

Computer does not power up. The green light on the back of the PS does not come on. I have 120 volts at the plug but when plugged into he power supply and push the power button on front of the computer...

make sure the switch on the back of the power supply is set to 120 volts , does the power-supply fan come on? if not it may be the power supply they are pretty inexpensive and not too dificult to replace

Sep 17, 2009 | PC Desktops

1 Answer

D4 Post code using tech aid diagnostic card

check power supply in back to see if you have on and off switch but you would'nt be the first with this problem from dell about the power supply going out meaning:

if you don't have nothing happening when your trying to boot the computer then it's the power supply, plug in computer power up and feel in back to see if the fan is blowing if nothing power supply is gone call dell.

Apr 05, 2009 | Dell Dimension 4400 PC Desktop

1 Answer

Dell Dimension 8300 wouldn't start

Sounds like a power supply. You are getting the standby voltage and not the switched. plug all your wires in except the big 20 or 24 pin motherboard connector, take a small wire and short the green (PSU_ON) to black (ground) wires. This will simulate the computers "ON" signal. The fans should all spin up and your plugged in accessories should work, which means bad motherboard, if not bad power supply.

Mar 24, 2009 | Dell Dimension 8300 PC Desktop

1 Answer

EMachine will not turn on.

Sounds like the power supply is faulty. Power supplies are very dangerous to try and repair, even for qualified technicians. I would also suggest not trying to plug it in or turn it on until the new power supply is in place. Faulty power supplies have been known to cause motherboards to permanently malfunction. Note: researching your issue, I came across several forum posts with complaints about emachines and their power supplies. The best way to solve this problem is to purchase a new power supply. If shopping online, and are two places that specialize in PC hardware. A 400-watt power supply would probably more than do the trick for you. The cheapest one I found was $18.00. Make sure the power supply is compatible with your motherboard before you buy.

Dec 27, 2008 | E-Machines eMachines Desktop PC

1 Answer

System turns on however hard drive will not cycle nor will mouse or key board activate

Turn power off and unplug power from computer.
Unplug printers,backup drives and speakers.
Open case and unplug power supply from the board.
plug power cord back in press the power button.
Of course nothing will happen.
unplug power cord again.
plug power supply back into the board.
plug power cord backup and press power switch.
If nothing happens unplug power cord again.
pull out your memory sticks and plug cord back in and press power button.
Of course not much will happen.
But really something is happening to your computer so continue.
Pull power cord and replace memory sticks.
replace power cord and press power switch.
Continue this pulling out pci cards one at a time until you find out what the problem might be.
Try different keyboards and mice too.
Good Luck

Oct 27, 2008 | Intel PC Desktops

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