Question about Dell 250W POWER SUPPLY NPS-250KB (NPS250KB) Power Supply

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Does nps-250kb need a power switch? - Dell 250W POWER SUPPLY NPS-250KB (NPS250KB) Power Supply

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Posted on Jan 02, 2017

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joecoolvette
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SOURCE: remove heatsink on dell NPS-250KB

Here is a Dell NPS-250KB,

http://www.justpowersupplies.com/dell-nps-250kb-b-power-supply.htm

This is a cutaway of an SMPS similar to yours,
(Switched-Mode Power Supply),

http://en.wikipedia.org/wiki/File:ATX_power_supply_interior-1000px_transparent.png

In-between the letters B and C, and C and D, are the Heatsinks.

The shiny rectangular block looking objects, are actually aluminum fins, and put together, have a rectangular shape.
They are connected in a row with a thin metal strip.

[DO NOT open a Power Supply plugged into power!
Dangerous voltages inside that can -> Badly to FATALLY shock you!
(Fatally = Kill)

The Electrolytic Capacitors inside are designed to hold a charge, then release it all at once. Power supply unplugged from power, the capacitors inside can hold a charge for weeks, months, sometimes over a year!
They need to be properly discharged before working on the unit ]

I have a feeling you mean towards a Processor's Heatsink, inside a Dell desktop computer.

There are styles where Dell used a type of Thermal Glue, and stuck the Heatsink to the Processor.
A hair dryer set to medium, and slowly swirled around, and around on top of the Heatsink, will soften the glue.

{The above is AFTER the mounting clips are unclipped, that hold the Heatsink to the Processor}

WITH A GLOVE the Heatsink is gently twisted a little, one direction sideways, then the other direction, until it comes loose.

You can feel when the glue is soft enough, to start twisting on the Heatsink. You can also feel when it is not.

DO NOT manhandle it. The Heatsink will come loose, but so will the Processor. You will have a Processor with broken/bent pins on the bottom. This = No.

Or your reference may be to a particular style that Dell used.
This is one of many. Used on an Optiplex G150 desktop computer,

http://support.dell.com/support/edocs/systems/opgx150/sm_en/smdsktp.htm#mphs_assy

(Scroll down)

So what is the Model Number of your Dell desktop computer? Post in a Comment.

Regards,
joecoolvette

Posted on Jul 10, 2012

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1 Answer

Remove heatsink on dell NPS-250KB


Here is a Dell NPS-250KB,

http://www.justpowersupplies.com/dell-nps-250kb-b-power-supply.htm

This is a cutaway of an SMPS similar to yours,
(Switched-Mode Power Supply),

http://en.wikipedia.org/wiki/File:ATX_power_supply_interior-1000px_transparent.png

In-between the letters B and C, and C and D, are the Heatsinks.

The shiny rectangular block looking objects, are actually aluminum fins, and put together, have a rectangular shape.
They are connected in a row with a thin metal strip.

[DO NOT open a Power Supply plugged into power!
Dangerous voltages inside that can -> Badly to FATALLY shock you!
(Fatally = Kill)

The Electrolytic Capacitors inside are designed to hold a charge, then release it all at once. Power supply unplugged from power, the capacitors inside can hold a charge for weeks, months, sometimes over a year!
They need to be properly discharged before working on the unit ]

I have a feeling you mean towards a Processor's Heatsink, inside a Dell desktop computer.

There are styles where Dell used a type of Thermal Glue, and stuck the Heatsink to the Processor.
A hair dryer set to medium, and slowly swirled around, and around on top of the Heatsink, will soften the glue.

{The above is AFTER the mounting clips are unclipped, that hold the Heatsink to the Processor}

WITH A GLOVE the Heatsink is gently twisted a little, one direction sideways, then the other direction, until it comes loose.

You can feel when the glue is soft enough, to start twisting on the Heatsink. You can also feel when it is not.

DO NOT manhandle it. The Heatsink will come loose, but so will the Processor. You will have a Processor with broken/bent pins on the bottom. This = No.

Or your reference may be to a particular style that Dell used.
This is one of many. Used on an Optiplex G150 desktop computer,

http://support.dell.com/support/edocs/systems/opgx150/sm_en/smdsktp.htm#mphs_assy

(Scroll down)

So what is the Model Number of your Dell desktop computer? Post in a Comment.

Regards,
joecoolvette

Jul 09, 2012 | Dell Computers & Internet

1 Answer

My Dell NPS 250KB D PSU is dead . Fan is not working at all. My PC didn't start up at all. Main Fuse is alright. Don't see anything damaged physically, no signs of any blown component. How to...


Another thing you can do is smell it.

But I got to tell ya, eBay has a bunch of them, for less than twenty bucks.

I've done it, it ain't worth the trouble. You'd be happier buying one from tigerdirect.com


PLEASE RATE THIS ANSWER

Sep 01, 2011 | Dell 250W POWER SUPPLY NPS-250KB...

1 Answer

Hi: no power from supply opened box and checked fuse - its ok! The computer had a virus and that was fixed restarted computer and it worked ok, the next day pressed start button and nothing happened....


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 there probably old and 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 are probably old and faulty a computer needs its connections to have an end so any faulty leads will end up with a computer error

hope this helps

Mar 20, 2011 | Dell 250W POWER SUPPLY NPS-250KB...

1 Answer

Set up New PC Studio that is NPS then install USB drive


i have to install PC studio in my PC but when i tried it shown that my PC does not have NPS therefore it can not be installed. tell me how to install NPS.

May 30, 2010 | Dell 210W Optiplex GX270 NPS-210 AB Power...

1 Answer

NPS-460AP, How to change to 230VAC


On the back should be a switch that reads 115v. There is a little notch that you can slide the switch and you can change it to 230v. Then at that point the power suppy will be setup to be ran for 230v.

Aug 30, 2009 | Dell - NPS-460BB-B (NPS460BBB) Power...

7 Answers

Set up NPS


while installing setup for samsnung mobile..a message appeared "NPS not exist "..wat do i do??

Aug 27, 2009 | Dell 210W Optiplex GX270 NPS-210 AB Power...

1 Answer

Dell Power supply NPS-460BB needing to upgrade


if its a laptop then no you can't i'm affraid, if its a desktop then you can


hope this helps

kind regards

Nov 19, 2008 | Dell - NPS-460BB-B (NPS460BBB) Power...

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