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Dell Power Supply Model #TFX0250D5W

Computer will not turn on, how do I troubleshoot power supply?

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First, check that your power cable is not faulty; believe it or not, it is a common problem.
Second, check that your power switch has not shorted out; that is another common problem.
Third, the only way to check your PS is to swap it out with another. If you don't have one, you can also order a power supply tester (which is what I have). Try and type "power supply tester" in their search box. Also check the user reviews for dependability.

Posted on Apr 23, 2014

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a 6ya expert can help you resolve that issue over the phone in a minute or two.
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SOURCE: HP computer doesn't turn on

Your power supply is bad--you will need to replace. I suggest looking at tigerdiect for a replacement.

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SOURCE: Emachine W2047 No BIOS Start Screen

You can test the power button. Remove the wires from the power on pins on the motherboard. Momentarily jump the two pins with a small screwdriver. If the computer starts the power button is bad. If it still doesn't start then something else is wrong. Did you test the memory? Also do all of the fans work, especially the CPU fan? It can't hurt to test with the other PSU. You know the HDD is good. Test one piece of hardware at a time and hopefully you will find the problem.

Posted on Jan 07, 2009

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SOURCE: Dell Optiplex GX280 Video Card Install Problem

You hit that one right on the dot.  ATI website showed the specs for that graphics card you installed as needing a 300 Watt power supply.  Good news though... I researched and I believe I found your 300W power supply.  There are 4 different Optiplex gx280 designs with 4 completely different power supplies.  Since you bought the low-profile video card, I believe you have the slim computer case and this power supply should work for you...

Good Luck

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SOURCE: My Dell Precision 380's power light is orange

Check all of the electrical connections to all devices in the machine, especially the motherboard. Many times this is a result of a poor connection being jarred loose during a move.

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Creative Con
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SOURCE: need pin assignment for model: m2n61-ax

If this is a Dell Inspirion 531 here is the owner maual with all the components

Posted on Oct 10, 2009

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go to dell web site then to support then type in board some do have autodect ok

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Wiring bestec atx 1523d to bestec tfx0250d5w revx4

Are you replacing one with the other or trying to wire them together? If the latter, why are you doing so? If you need more power, you'll want to buy a bigger power supply. I suppose you could wire it to use two, but you'd have to find a way to trigger the second power supply to come one or do it manually. I wouldn't try it unless it was an absolute last resort with no other options, though.

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No Pwer

The Power Supply is bad dwadley.

Weak voltage power rail.

1) IF all of the LED lights were on at once, they would use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts of power.

3) A typical Processor can use 51 to 125 Watts of power. Just depends on what Processor it is.

The Dell Inspiron 530s series of desktop computers, come with an Intel processor.
Options are either a model of Core2 Duo, Pentium Dual-Core, or Celeron.

Click on Specifications.

Replacing the Power Supply,

In the middle column at the bottom, click on Power Supply.

The computer is an SFF design. Small Form Factor.

Because of the space saving design, the Power Supply is an SFF design also.
Makes it special.

Just one example, not a recommendation. You search for the best price and quality,

Click on the Power Supply image.
(Whew! That get's great big! NOT!)

An average ATX power supply's dimensions (Used in most mid-size, and full size desktop computers), is approximately;
6 Inches Wide, 5-1/2 Inches Long, and 3-1/2 Inches Tall.

The SFF power supply dimensions in your desktop computer, is around
4-1/2 Inches Wide, 3-1/2 Inches Tall, and 5-1/2 Inches Long.

The dimensions are what makes it special.

Another view of the Power Supply,

1) Computer on a table, computer unplugged from power, (AT the surge protector side. NEVER unplug at the Power Supply side), computer case open.

2) Follow Anti-Static Precautions.

Anti-Static Precautions:
Your body carries Static electricity. Static WILL fry out (Short Circuit) the hardware components inside a computer.

Relieve your body of Static BEFORE working on the computer.

Again, computer on a table.
A bed, couch, or directly on a carpeted floor, are HIGH areas of Static.

If your table is on a carpeted floor, refrain from swinging your feet across the carpet.

Computer unplugged from power, computer case open, TOUCH the metal frame of the open computer case, (Unpainted surface), to relieve your body of Static.

IF you leave your computer in the middle of working on it, be SURE to Touch the metal frame again upon your return.

3) Opening the computer case;

4) You will have to disconnect all power cables, leading from the Power Supply. (Upper rear of computer case)
Make notes, and drawings as to where each cable plugs into.

If you have problems when reconnecting the power cables, Relax.
Just post in a Comment, and I will guide you step by step.

The plastic Front of your computer is the Front Panel.

The area of contact pins on the motherboard, that the cables (Wires) from the Front Panel go to; is the Front Panel header.

DEFINITELY make notes, and drawings, as to what Front Panel cables, plug to what contact pins, BEFORE touching anything inside the computer.

If you accidentally knock a cable off a contact pin, (Or more than one),
I Do NOT have the pinout to give you.

(The Front Panel cables may all go to one connector, that fits over the Front Panel header contact pins. I do not know.
Haven't worked on one yet, and have not owned one.

Each Front Panel header, and Front Panel cable connections, are specific to that computer.

The rest of the technology used inside the computer, is just standard desktop computer technology. )

For additional questions please post in a Comment.
(And/Or to have me explain further on anything I have stated )


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Your Model of Dell Poweredge 1800 server may not have a redundant power supply. The power supply is the most like cause of the problem. order a replacement power supply and replace the faulty unit.

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Dell Inspiron 1721 will not power on,light on power supply flashes rapidly.

First, try and take out the battery and start the computer with just the power adapter. If the power adapter is still blinking, replace the power adapter. If the computer turns on with just the power adapter, replace the battery.

If the battery status light rapidly flashes amber, the battery may be defective. Purchase a replacement battery from Dell.

If the power supply status light flashes, the power supply may be defective. Purchase a replacement power supply.

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Check it for dust / dirt. Clean it or replace it.
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My Dell Dimension 5100C will not come out of sleep mode. Everytime i press the power button, the light blinks orange and keeps blinking ,no noise from the inside or anything. It Just stays in hibernate...

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