Question about Lite On (PA41519B1) 150-Watt Power Supply

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FAULTY POWER SUPPLY FOR LITE ON PS -5251-2DS

NO DC VOLTAGE READINGS FROM THE 20 PIN MAIN POWER CONNECTOR

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When connected the AC power , no DC voltage reading from the p.s.

what to do?

how can i turn it on?

Posted on Nov 24, 2008

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I have not yet solved it.I measured the suspected transistor attached to the heat sink , its ok.Iam still troubleshooting.

Regards,

FRANCIS

Posted on Oct 05, 2008

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My 873 n will not turn on


if you are refering to a computer

Test your PSU or replace it if your power supply units fan is not working your PSU is faulty

One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect/ boot up a computer hard drive

Test all leads that attach to your hard drive including electrical extensions,IDE,SATA

the leads from your "((MOTHERBOARD TO YOUR HARD DRIVE))" make sure they have a secure connection and are not faulty or just replace them they could be faulty
make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electrical extensions or just replace them they could be faulty a computer needs its connections to continue its cycle and have an end so any faulty leads will end up with a computer error even something as small as a faulty electrical extension or fan lead can cause this problem

follow the troubleshooting procedure a computer needs all of the data and electrical current to travel through every device and to have an end to be able work properly

a motherboard and a hard drive any leads between them will fail before your motherboard or your hard drive if its a flat ribbon 40 pin type IDE replace it this will be the first to fail check all electrical extensions make sure they are securely seated even the cd/dvd floppy drives need to have current go through make sure these drives are working also it could be a dirty computer clean all of the dust from your computer you could use a vacuum cleaner but whatever you use make absolutely sure there is no moisture gets to anything in your computer and before you touch anything be sure to wear an earth strap hope this helps

May 30, 2011 | HP System Power Supplies

1 Answer

My power went out and when it came back on the computer would not come on


eMachines uses low quality hardware components inside their computers. This is the way they can sell them at budget prices.

One main hardware component is the low quality power supply they use.
A generic power supply made by Bestec. (A generic power supply manufacturer)

(PSU. Power Supply Unit. The type of PSU used is a SMPS.
Switched-Mode Power Supply,

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

Low quality;
A) Electrolytic Capacitors (Radial Aluminum Electrolytic Capacitor)
B) Rectifier Bridge
C) MOSFET/s
D) Wiring is too small in gauge
to name a few of the components.

However IMHO it is also best to check out the Power On switch.
There is a simple test to see whether the problem is a faulty Power On switch, or a faulty Power Supply.

The test involves bypassing the Power On switch. The Power On switch is not involved in this test.
A jumper wire is used on the Soft Power On wire, [ PS-ON ], and a Ground wire in the ATX main power cable connector.

If you bypass, and the Power Supply comes on you have a bad Power On switch.
If the Power Supply does Not come on you have a bad Power Supply.
If you would like to know more in detail on how to perform this simple test, simply post so in a Comment.

The Power Supply used is just a common ATX version.
ATX refers to the Form Factor of the power supply.
Regular size ATX form factor is approximately 6 inches Wide, 5-1/2 inches Long, and 3-1/2 inches Tall. (Height)

There are also differences in the pinout of the ATX main power cable.
Yours may have 20-pins, or 24-pins.
Power Supply's sold now take this into consideration.
Their ATX main power cable can be used as a 20-pin, or a 24-pin version.

[ General example of a 20-pin ATX main power cable, and it's connector,

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

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

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

Your motherboard may also require an additional power cable, commonly referred to as a P4 power cable, or P4 ATX 12V power cable, or just ATX 12V.
The actual name is 4-pin ATX +12 Volt power cable,

http://www.playtool.com/pages/psuconnectors/connectors.html#atx12v4

If you would like help in finding an inexpensive reliable Power Supply, please post in a Comment.
I will need to know what Model Number of eMachine you have. It's on the back next to the Windows product key, or up on the side of the computer tower.

If you need anything explained that I have stated here, please let me know in a Comment.
Regards,
joecoolvette

Apr 21, 2011 | E-Machines Bestec ATX-300-12E Rev. D 300w...

1 Answer

How can you tell if a Dell power supply for a PowerEdge 2900 is good? Should the lights at least indicate when power is connected even with the PS is removed from the machine? How do you best determine if...


You cannot test the power supply on the bench just by connecting it to the mains power. You need to know which pins on the connector to activate the power supply and you need to connect a load to the power leads.
The best way to test the power supply is to leave the power unit connected to the computer power up the computer and test a spare 4 wire power connector with a multi-meter. Leave the other power leads connected to the various drivers.
If computer's power LED should light up then test the voltages.
The Red and black wire should read 5 volts.
The Yellow and black wire should read 12 volts.
If the power LED does not light up, check the mains lead in another appliance to see if the mains lead is OK.
If the mains lead is OK then most likely the switch mode power supply has died.

Dec 28, 2010 | Dell 930-Watt Power Supply

1 Answer

Does Codegen PS-450W PSU have connector PCIexpres with 6 pins or less_ Thank You


from what i see, I dont see a pciexpress power connector and I read it does not have SLI capabilities. so I believe no is the answer, sorry.
Features
Connectors 1 x Main connector (20+4 pin)
1 x 12V (P4) (8 pin)
7 x peripheral

1 x SATA
2 x Floppy

Aug 12, 2010 | Codegen (PS-450W) (PS450W) 450-Watt Power...

1 Answer

How can i use this power supply in a stand alone situation to DC cooling fans only? if i just plug it in i get no output voltage.


look at the ATX connector.
http://www.smps.us/atx-connector-20-24pin.jpeg
Now you need to connect pins 15 and 16. They are normally Green and Black. All you are doing is connecting the signal the PSU looks to turn on into a ground.

So the best way and cheapest way it to bend a paperclip and put one end in the green wire and another in the black one.

I use this trick almost every time I am fixing computers. It specially awesome when you want to run a water cooling system without turning on the computer.

Apr 24, 2010 | Dell (PS-5251-2DS) (M0148) 250-Watt Power...

1 Answer

NPS-200PB-73M


Hi,
SPECIFICATIONS:
Dimensions 5.9"W (150mm) x 3.4"H (86mm) x 5.5"D (140mm)
Special Features Dell Proprietary Main ATX & 6 Pin Auxiliary Connectors
AC Input 100-120V/7A 60Hz 200-240V/3.5A 50Hz
DC Output Voltage 3.3V 5V12V
Total Output Max Load 200W


Regards.

Jul 20, 2009 | Dell - NPS-200PB-73M (NPS200PB73M) Power...

1 Answer

I would like to know how to troubleshoot a brand new Ultra LS600 power supply. I would like to go beyond hearing "it's dead" since I am getting power to the motherboard (via indicator light)m but the PSU...


You can start the PSU manually with a paper clip.
Remove the 20 pin connector from the motherboard, leave the four pin power connectors attached to your various drives (this will provide a load on the power supply when it start up (provided it is not faulty).
Look at the 20 pin connector with the connector facing you.and the locking clip to your left.
The fourth pin from the bottom LH corner should be a green colour wire and the next two wires (5th & 6th pin) should be black and next to the locking clip.
Straighten a paper clip and insert it into the 4th pin and into the 5th or 6th pin (ie connect these wires together). These wires connect to the front panel switch to turn on your computer. You are testing the power supply only and since it is not connected to the motherboard the computer won't start.
Now connect the power unit to the mains and switch on the mains, if the power supply is OK the PSU fan should spin up and your hard disk should also spin up. If nothing happens the the PSU is faulty.
You can test the +5volts and +12volts supply on a 4 pin power connector with a multimeter. The red wire is +5volts and the yellow wire is +12volts and the black wires are negative (ground). The voltage readings should be within 5% of these voltages.
There are other voltages to be checked +3volts, -5volts, & -12volts. but these are not as critical.

Dec 05, 2008 | Ultra Products Ultra LS600 Lifetime Series...

1 Answer

No Power


Dear Sir,

I assume, you have voltmeter with you.
Set VOM to DC 20 V range.
Remove the Power Supply from cabinet. Be sure you have proper earth in your house/workshop.
On the 20/24 pin main connector of your power supply, short the pins carrying green & black wire.
Hook your voltmeter -ve on any black pin of the connector permenantly.
& then connect the mains power cord to your power supply.
If your power supply is ok, this shall start the fans of the power supply on & running. Now you can check the voltages on different pins. There is a sticker on your power supply showing the normal voltages on every wire.
If you don't see any / normal volatges, your power supply needs repairing. You can buy a new one/ repair existing.

Jun 17, 2008 | Silverstone SST-ST405 (SSTST405) 400-Watt...

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