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I have a problem with power supply. I have tested the power up to the unit and all seems to be well but the unit will not power up. Is there an internal fuse or something that can easily be accessed or replaced?

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I had a problem with the wires coming away from the plug on the power cord & the casing split, it started a bit loose but overtime got worse until it would not work. my unit is still under warranty period, but whether they will give me a replacement cable free of charge remains to be seen. I am waiting to hear from them now to get back to me! I had a similar problem on a different device & it turned out that the pins on the back had corroded away & couldn't make contact. so now I have learnt to use Vaseline on all vulnerable parts like this, it works really well at preventing moisture getting to it.

Posted on Dec 14, 2016


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Posted on Jan 02, 2017


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IBM wheelwriter 10 series ii 6783-001

try to figure out any short circuit that causing power supply to come in safe mode , just give me more details about power supply , what kind of power supply is it?

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I have a vx900 internal power supply. Wont power on at all so I checked the caps, seems good, I tested the power supply, 11 volts out of the unit but 2.5 volts when it is reinstalled. What do I need to do...

There are two version of this monitor, one has built-in power supply, another one uses 12vdc adapter.

The adapter is REGULATED 12vdc 6a power supply that can handle the load up to 6a, if when is has load on it and the voltage drops down to 2.5vdc, teh it is that the power supply is bad or you have shorted circuits in the monitor. You can test the power supply using 12v car lamp such as #1157 bulb to test your power supply under load.
Caps in the power supply do go bad as you can see in my pictures here:

Mar 10, 2011 | ViewSonic VX900 19" LCD Monitor

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The computer will not turn. tested power supply and seems to by ok (fan spins)

The motherboard is responsible for turnin on the power supply, if the power supply fan is working then the system has started it initinal POST procedure. Try disconnecting any phrephial devices from the unit, starting with the Harddrive DVD Drive Etc. Also you may have a bad video processor on the motherboard, that is causing no video.

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Fisher & paykel 501 smart drive washing machine

It does not seem like a problem of the unit. It might be a loose connection of supply code. Keep the supply code pressed to the unit in different directions and see if the unit takes power. If so, replace the supply code. It's not that expensive.

Jul 05, 2010 | Washing Machines

1 Answer

HP Pavillion pc doesn't boot up ... no fan, no start sound, nothi

Bad Power Supply.

The blinking green light on the power supply, is a diagnostic light that indicates this.

Suggestion is to;
1) Test the Power Supply voltages
2) Replace the Power Supply with a Known to be good, Compatible unit, for a test.


A) It is an ATX style of power supply.
The style used by 90 percent, of personal computers out there.


The test Power Supply unit should be mounted in the computer, for testing.
The power cables only reach so far, plus it is safer.

B) At least a 250 to 300 Watt unit, for a test unit. More Wattage is okay.

(The power supply that comes with the Pavilion a1310n, is a 300 Watt unit.

The 250 Watt unit stated above is just for a Test.
You are testing to see if the Power Supply is the problem.

More wattage is okay as a computer only uses what it needs.
If you have a 1000 Watt power supply installed, and the computer only needs 100 Watts; the computer only uses 100 watts.

The computer Will Not burn up, by installing a power supply with more Wattage than the original)

C) Correct amount of power cables, and correct kind.

Observe the power cables from the existing power supply, that are plugged into the various hardware components in the computer, and to the motherboard.

The test unit has to have the same power cables, and the correct amount of them.

Need help identifying these power cables, reply in a Comment.

The above may sound funny. Who has a spare power supply laying around, other than someone really committed to computers?

You may find yourself, or someone you may associate with, has a computer sitting in a closet, basement, attic or garage, that has a working power supply, (And is compatible), and can be used for a test unit.

Test the Voltages.

There are three main Voltages, produced by a personal computer power supply.
(DC. Direct Current)

1) 3.3 Volts (Wires that have Orange insulation)
2) 5 Volts (Red wires)
3) 12 Volts (Yellow wires)

(Two D cell flashlight batteries are 3 Volts {DC)

ANY Black wire is a Ground wire.

Use an economical multimeter to test the Voltages, or a power supply tester.

Power Supply on.
Positive probe lead (Red) connects to the power wire to be tested.
Negative probe lead (Black) touches ANY Black wire.
(Black insulated wires are Ground wires)

This is one example of a power supply tester,

What causes Power Supply failure?

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

Computer unplugged from power, (Computer case open, and anti-static precautions observed), a can of compressed air for computers is used on a regular basis as needed, to help prevent this.

There are two cooling components for a SMPS.
(Switched Mode Power Supply)

1) The internal fan
2) The Heatsink's inside

A Heatsink, is an object used to draw heat from whatever hardware component, it is placed against.

A Heatsink is generally just a flat, square piece of metal, that has tall, thin fins protruding from it.

The flat metal base absorbs heat, whereby it is absorbed by the tall thin fins, and radiated away.

In the case of a Power Supply, there is an internal fan which draws air in-between the fins, helping to carry the heat away.

Once the fan blades, (Plus center hub, and surrounding cage), become coated with gunk, and the Heatsink fins become coated, the cooling capacity drops tremendously.

Heat = Wasted Energy.
The Power Supply has to produce more power, to keep up with loss of energy.
Eventually hardware components inside the Power Supply fail.

B) Cheap quality components used in the power supply. (Cheap quality power supply)

Awaiting any question you may have regarding this.
Post in a Comment.
(Believe upper right of your page)

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1 Answer

I purchased a Sparkle SPI270LE power supply as a replacement for a 160W power supply in my HP Pavilion s3220n PC. On installation, the unit would not power up. All connections were hooked up correctly. I...

These power supplies can be tough to test without a bonifide genuine load tester made for these power supplies. Switching power supplies seem to need a load in order to operate. If you have everything plugged in including your hard drives and it still doesnt work then it is likely defective. I have a apparently good power supply that decided to do the same thing to me in a working machine. I swapped out the power supply and it worked again.
Sometimes new power supplies can be no good. Switching power supplies can be somewhat fragile. The newer the power supply the more fragile they seem these days.

Mar 14, 2010 | Computers & Internet

1 Answer

Unit turns self off sometimes...LTV-32w1

well you know iot is hard to think that but it seems you may have had a signal board problem to start with and it seems that your power supply is working from what your telling me
and you may well have gotten two power supplys that have issues you have done the leg work and by deduction it all points away from your power supply and that is the risk you get in servicing this stuff .
some of there supplys arnt rebuilt or repaired there from field scrapped unit called certified parts and im not against this at all
but it is possible if you were closer id take a peek at the set with you just to satisfy my own curiositys as well

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52-52 HM84 there is sound no picture there is flashing green light and steady red light. Television shuts down after a few minutes. Thanks Felipe

Seems like you might have a bad CAP " capcitor in your powers supply unit. How you can tell this? Opening up the unit and do a HI POT test on your power supply unit and check for faults. You have to be qualified to check this and know what your doing otherwise you could recieve a nice jolt and pay a few hundred for a EMS to revive your heart. So leave this one to the experts if you do not know the logistics of this issue. Assuming your asking me a repair tech would consitute you do not know whats going on seek qualified help.

1. replace powersupply unit
2. Rebuild power supply by replacing the caps inside that have tested bad.

Good luck to you on whatever your situation may be but as always Thanks for asking me first!!!

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Error 2200 lexmark 6250.

hey ,

Follow the steps :-

Step Action
1 Power off the All-In-One (AIO) and remove the power supply from the back of the unit. Wait 30 seconds. Then reinsert the power supply and power the AIO on.

Did the error message return?

Yes: Continue to step 2.
No: Attempt a test scan. If the error message does not reappear, the error is resolved.

2 Power off the AIO and remove the power supply from the back of the unit. Open the scanner cover. Check the scanner glass for cracks and the scanner casing for cracks. Close the scanner lid. Open the top cover of the AIO. Using the carrier belt, move the cartridge carrier to the middle of the unit. Remove both cartridges, close the top cover, reinsert the power supply, and power the AIO on.

Did the error message return?

Yes: Continue to Contacting Lexmark.
No: Continue to step 3.

3 Power off the AIO and remove the power supply from the back of the unit. Open the top cover of the AIO. Using the carrier belt, move the cartridge carrier to the middle of the unit. Insert the color cartridge, close the top cover, reinsert the power supply, and power on the AIO.

Did the error message return?

Yes: Repeat step 3 with another color cartridge. If the printer fails again, continue to step 4.
No: Repeat step 3 and install the black/photo cartridge. If both cartridges are installed, attempt a test scan. If the error message does not reappear, the error is resolved.

4 Power off the AIO and remove the power supply from the back of the unit. Open the top cover of the AIO. Using the carrier belt, move the cartridge carrier to the middle of the unit. Remove the color cartridge and insert the black/photo cartridge. Then close the top cover, reinsert the power supply, and power the AIO on.

Did the error message return?

Yes: Repeat step 4 with another black/photo cartridge. If the printer fails again, continue to Contacting Lexmark.
No: Install the color cartridge. If the printer fails, continue to Contacting Lexmark. If the error message does not appear with both cartridges installed, attempt a test scan. If the error message does not reappear, the error is resolved...

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Dell power Supply has won't work

Hi, all power supply's have a fuse in them, remove the power supply, open it up and study the printed circut board, you will see either a white ceramic or glass fuse attached to it. Replace this and reasemble it then re-install it into your computer and then test it. If you still have no power then you will have to replace the unit as the costs of repair are far greater than a new one. Goodluck, mistyman

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