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Power surge We had a power surge. Our one TV and computer (in the same room) will not power up. Someone mentioned it may just be the power supply. How can I check this?

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You will need either a digital multimeter or a Power supply tester(recommended) for a couple of dollars on ebay the power supply tester is much easier than trying to test it yourself.

you can get one here

http://cgi.ebay.com/PC-20-24-Pin-PSU-ATX-SATA-HD-Power-Supply-Tester-Tool-B_W0QQitemZ300260901275QQcmdZViewItemQQptZPCA_UPS?hash=item300260901275&_trksid=p3286.c0.m14&_trkparms=72%3A1234|66%3A2|65%3A12|39%3A1|240%3A1318|301%3A1|293%3A1|294%3A50

This is a link to the tester that I own.

I would suggest a better method of surge protection. Go to radio shack and spend about 50-75 bucks on a good surge protector.

Posted on Jan 18, 2009

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Most surge protection power boards will protect computer equipment from mains spikes and surges.
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No power cannot turn on


Suggest you check the simple stuff first.

Not checking is akin to a car that won't start, and tearing apart the entire fuel system, only to find it was just out of gas.

1) Make sure the receptacle the surge protector is plugged into, has power. Surge protector Power On light should be lit.

2) Check THE receptacle in the surge protector, that the computer itself, is plugged into.
Have had a number of expense surge protectors, where just THAT receptacle was bad.

("Hmmm, surge protector Power On LED light is lit. Monitor, printer, sound system, and router plugged into the surge protector has power. Should be good to go.

NOT!
Plug a table lamp, or similar device into THAT receptacle.
Make SURE it has power)

Surge protector, and receptacle in surge protector checks out?
Bypass the Power On switch.

See if the problem is a $5 Power On switch, or the Power Supply.

(Generic ATX Power On switch that I have found fits many computers,

http://www.directron.com/atxswitch.html

{The Power On switch, is located inside the plastic Power On button assembly}

This is information about computer Power Supply's,

http://en.wikipedia.org/wiki/Computer_power_supply

This is a basic example of an SMPS, (Photo at upper right. You can click on the photo to enlarge), and info about.
(Switched-Mode Power Supply. The main type of power supply used in personal computers),

http://en.wikipedia.org/wiki/Switched-mode_power_supply

By bypassing the Power On switch, you will be able to determine if the problem is the switch, or Power Supply.

Bypassing the Power On switch turns the Power Supply on?
Bad Power On switch.

Bypassing the Power On switch does Not turn the Power Supply on?
Bad Power Supply.

A jumper wire is used on the 20, or 24-pin ATX main power cable.
The jumper wire goes to the Soft Power On, (PS_ON. Green in color), to ANY Ground wire.
(ALL Black wires are Ground wires)
A MOMENTARY contact is used.

(Example of a 24-pin ATX main power cable, and it's respective connector,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24 )

In order to guide you in this procedure, I need to know the computer manufacturer name, and Model Number.

On a desktop computer this will be located on the Back of the computer tower, (Next to the Windows product key), or up on the side of the tower.
Some models have it where there is a door you open in the front, and the product number, or model number is located there.

Post back in a Comment.

Aug 07, 2010 | HP PC Desktops

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...


Diagnose.

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,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4236686&sku=C13-2507


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,

http://www.directron.com/atxswitch.html ]

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,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20

Typical 24-pin ATX main power cable,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

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

My desktop dont come on


1) Check THE receptacle in the surge protector the computer is plugged into.

I have found more than once that One bad receptacle in the surge protector is bad.

"Hmmm, surge protector power on light is lit." "Monitor has power, amp for the speakers has power, and the router has power."
All plugged in to the same surge protector.

Tried a table lamp into the receptacle the computer was plugged into, Nothing.
Replace surge protector.

2) Bypass the Soft Power On of the Power Supply, and see if the problem is the Power On switch, or the Power Supply.

If you bypass the Soft Power On of the Power Supply, and the Power Supply comes on, the problem is a bad Power On switch.

If you bypass the Soft Power On of the Power Supply, and the Power Supply does Not come on, the problem is the Power Supply.

If you wish to know how to perform this simple test, just state so in a Comment.
(Believe upper right of your page)

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Dell Dimension 3100


You most likely just need a new power supply. You can pick these up for around $40 for a 450W, which is plenty for your machine. Pretty simple to replace, unscrew the 4 screws in back, around the fan on top, then unplug all the power wires, pull the old one out, and then put the new one in. There is a slim chance that other components were damaged, but this is your first step to fixing it. The power supply is the martyr of the computer. It will throw itself in front of power surges to save the rest of your computer....

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1 Answer

Nothing hooked up to usb ports but computer tells me power surge


umm, usually you can't. your board is probably feeding too much current/voltage to the usb ports or someone shoved a paperclip into the port and shorted it out (frying the power supply to the usb ports) in any case, you will probably need a new motherboard or power supply.

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I bought a pair of HP x1100 Workstations in December for the kids. One of them stopped booting. It made a modem noise and then beeps twice. After reading some forums, I installed a new power supply and the...


Make sure you have enough power (wall outlet, Surge Protector (MUST HAVE A GOOD ONE)
And Double Check that the Power Cable is 3-pronged, NOT one that someone pulled the ground pin off of!!! THATS BAD!!!

Or you just got a bad Power Cable,

Also Make sure you have a BIG power supply (I recommend at least 450 watt PS!

Check this all as if it was a checklist.....so far I believe your motherboard is just fine......the problem is somewhere between your Outlet, Power Cable, and Surge Protector (I really hope you are running it on one.....Never run any computer or Valuable components without one!)

I only mention that because some people don't realize the importance of surge protectors)

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1 Answer

Green light flashing on the back of the cpu


Your power supply just died. If you don't have a surge protector, the power outage probably sent too much voltage to your computer. A power supply is relatively easy to install, but you do have to have some knowledge to do so.
Try looking at this: http://www.fonerbooks.com/r_power.htm
If you don't understand it, you should be able to get someone to replace it for you for relatively cheap. Also, you can get a new power supply for about $20 on E-bay.
Also, make sure your computer-- and all major appliances-- have a surge protector on them, because this kind of stuff happens ALL THE TIME.

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If your power supply is bad, there is typically a much cheaper way to fix it rather than purchasing a new one.

If you know a little about electronics or know someone who does have them open up the power supply and check the capacitors. Often times when a power supply goes bad its the result of capacitors going bad.

If you notice on the ends of any capacitors a brownish/whitish discharge or "bulging" then the capacitor has gone bad.

A new one typically cost less than a dollar and replacing it is fairly easy if you know how to solder.

Let me know if you have anymore questions and hopefully if this is the case you can save some money.

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