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

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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. Put in another mother board and still nothing happend!!

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  • Dell Master
  • 27,725 Answers

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

Posted on Mar 20, 2011

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Posted on Jan 02, 2017

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1 Answer

Dell computer wont start up


Tough one, but inspect the motherboard for a blown capacitor. You could test the power supply with a simple voltmeter. Not to mention simply seeing anything lit with the case open while powered one. gl

Dec 12, 2012 | Dell OptiPlex GX280 PC Desktop

Tip

How To Remove A Virus From Your Computer


Requirements: On an uninfected PC connected to the Internet, download the following programs to a thumbdrive. We will need this to fix the infected computer.
Instructions:
  1. Shut down the computer as soon as you realize there is a problem. Pop-ups, program errors, dll errors, fake Anti-Virus scanners, and similar are signs there is a problem. Shut down the computer normally, or hold the power button in until the computer shuts off.
  2. Power on the computer, and hit F8 before the Windows Startup screen appears. Select Safe Mode.
  3. Login if asked to, if not select Yes to continue.
  4. Click on the Start menu, select Run, type msconfig and press Ok, or type msconfig into the Start menu search box and press Enter.
  5. Under the General tab, select Diagnostic Startup. Press Apply.
  6. Under the Services tab, check the Hide All Microsoft Services box, and uncheck any services you don't recognize in the window.
  7. Under the Startup tab, select Disable All. Press Apply and Ok.
  8. Don't restart the computer yet.
  9. The System Restore Utility backs up selected files automatically to the Restore folder. Quite often are infected files stored there as backup files, and many Virus Scanners are unable to delete these files. If you suspect your computer may be infected, it is recommended that you disable the System Restore Utility to remove the infected files from the Restore folder.Select your OS for directions on how to disable the System Restore Utility - XP, Vista, 7
  10. While in Safe Mode, insert your USB thumbdrive and open it in My Computer.
  11. Open Combofix.exe, select Ok when it asks. Let Combofix scan and remove any infections it finds. It should restart the computer when it is done. When it restarts, boot up into Windows normally.
  12. Login if asked to, open your thumbdrive in My Computer again, and run Combofix.exe once more.
  13. Open up SmitFraudFix.exe from your thumbdrive. Press any key to continue when asked. Type 2, and press enter. When the scan is complete, restart your computer.
  14. If you had a fake Anti-Virus Scanner infection, open up Remove Fake Antivirus.exe from your thumbdrive. Press Start, and press Yes. When the scan and removal is Complete, restart the computer again.
  15. Install Microsoft Security Essentials, or your choice of Anti-Virus Software when the computer returns back to the desktop.
  16. Restart if asked to, and when the computer restarts, run a Full Scan in Microsoft Security Essentials.

on Feb 25, 2011 | Computers & Internet

1 Answer

Hp p1005 stopped working


Printer switching on?.Might be power supply failed, replace Power supply board.if you are tech guy..Open left,right & back doors. Check input fuse.. if fuse open replace with same rated fuse, give power, check.. if again fuse is open replace power supply board. if its OK wait few minutes & confirm.. fix it back..

Nov 28, 2011 | HP LASERJET P1005 Printer

2 Answers

The computer start after 3 or 4 attempt when I press the power button. When the computer is on & I restart my computer from Start - Turn off computer - Restart. - my computer shut down instead of...


If the computer is not truing in first attempt then check for the earthing is OK or not. Then check the power is correctly supplying or not. There may be a chance in loose connection of the switch of your cabinet. If the system is shutting down when you give restart, then it may be problem of power. If the power part is is OK then the operating systems is to re-installed or repaired.

Jan 13, 2011 | ASUS M2NPV-VM Motherboard

1 Answer

When turning on my computer it just beeps intermintenly.


uH-oh, power restarts like that can damage power supplys, motherboards, and hard drives----even if you are connected to a surge protector. You can try the following, then begin to check the power supply, then the hard drive and video card seperately....
These are the steps that you need to take, and the instructions on how to do it:
1. Reboot into Safemode
2. Run a virus and spyware scanner
3. Defrag
4. Scandisk
5. Registry error repairing
6.Reboot into regular mode windows

Here is how to do it:
Reboot yor machine while holding the F8 key right as it boots back up. A menu will apear. Choose -->"start windows in safe mode with networking".
Windows will start in safe mode. Run an AVG virus scan, then run Defrag by exploring your computer, right click on C: drive, click PROPERTIES, then the TOOLS tab, click the "check now" button, and only checkmark the top box 'fix file system errors', then click ok, the computer will then tell you it will scan upon next reboot., Now click the DEFRAG NOW button. the choose defrag. After Defrag runs for about an hour and it is finished, restart the system. If is still won't run normally, go back into Safemode buy pressing F8 on reboot, then run a registry fixing program such as uniblue registrybooster, then reboot again. If it still won't run right, you may want to reinstall Windows and see if that works. If reinstalling windows doesn't fix it, it is definitely a hardware problem.---Most likely the power supply!!
PRINT THESE INSTRUCTIONS AND KEEP A COPY NEAR YOUR SYSTEM FOR FUTURE PROBLEMS. THIS SERIES OF STEPS CAN FIX MANY PROBLEMS
Good luck.
James.
------PLEASE RATE THIS ADVICE WITH 4 THUMBS UP!!!-----
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Apr 25, 2010 | HP Hewlett Packard Pavilion Slimline...

2 Answers

My computer keeps shutting down for no apparent reason... I hasve a toshiba satellite p10...


Possible causes of the problem:
-
System overheating
- Virus infection
- Power supply malfunctioning

Solutions:

- Check your computer if the fan is properly working.
- Scan your computer for viruses
- Check your computer power supply by a qualified technician
- Reinstall your computer operating system

Try this also:

From the run box you can type shutdown -a and that should stop it from shutting down long enough for you to fix the problem.You need to look up how to remove msblast from your computer.

Nov 17, 2009 | Toshiba Satellite P105-S921 Notebook

2 Answers

My pc take restart again and again.


Check for bloated capacitors in your motherboard. It may be the reason why your system keeps on restarting. If there are bloated capacitors then its time for you to change the whole motherboard or the whole computer set itself. Or - Another reason could be that your computer is infected by a Sasser. If you see an error message window with count down, then it is infected by a sasser. Download sasser removers. Here is another way to stop it--- Use System Failure Settings to Stop Automatic Restarts.

1. Click Start and Open the Control Panel
2. Go to System and Maintenance, Click on System.
3. Select Advanced System Settings and choose Advance tab.
4. Under Startup and Recovery, click on Settings.
5. Under System failure uncheck Automatically restart.
Hope this helps!

Aug 09, 2009 | Symantec Norton AntiVirus 2008: Windows

4 Answers

SimpleDrive I cannot retrieve files; Model No. 96300-40001-001


Hello,
i think your system has a virus problem, plz check with a fully updated antivirus programme and then check again.
ok
bye
ramesh

Nov 18, 2008 | SimpleTech SimpleDrive Portable USB 2.0...

2 Answers

PC keeps on restarting


Power supply can be your issue , when windows boots from CD it a mear dos-mode boot , If it was motherbaord problem it wouldn't boot at all . If you move power supply to test the motherboard issue just make sure it enough power to boot the other motherboard ( some pwer supplies can boot all motherboards )

Jul 31, 2008 | ASUS P5S800-VM Motherboard

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