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My dell xps 420 just lights up but does not turn on and it sometimes the fan makes a loud noise

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Hi ,
Two things come to mind ,
1st , check you video card to make sure its ok , you can do this by hooking up a 2 nd monitor to see if it does boot
2nd , depending how old the unit is , it just might be the cpu or prosessor has fried , and that would cause it not to boot if it got to hot .
so , try the 2nd monitor , and let me know what happens.....Roy

Posted on Nov 06, 2012

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Hi not clear in the video what display in the screen after you turn on the pc.if the pc rebooting the system or no signal appear. will anyway to ensure if not monitor problem tried first to use with other monitor,if the same problem so it was pc issue. now the first thing you have to check will be the video card since their is no video appear in the screen. remove the video card then hooked up the vga cable into the vga port of the pc let see if you can get video. by the way what fan are you telling us? the fan from the power supply or the fan at the processor?.

Posted on Nov 06, 2012

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Posted on Jan 02, 2017

joecoolvette
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SOURCE: My Dell XPS 420 will not turn on. Power light

Hey! Nice Computer! ( At least while it was working! Specifications show some high-end hardware parts)

Steady amber light on the Power On light, means a bad power supply.

The Dell XPS 420 uses the standard ATX style of power supply found in 90% of computers out there.
(Personal computers. Not the Cray Supercomputers!)

This is Dell Support, and the User Manual - Removing and Replacing Parts - part of the manual,

http://support.dell.com/support/edocs/systems/xps420/en/OM/HTML/parts.htm#wp1466871

From Me:

1) Computer unplugged from power, computer case open. TOUCH the metal frame BEFORE you reach inside.
Your body carries Static electricity.
Static will fry out computer hardware components.
You won't see it, or feel it.

Computer unplugged from power, you are safe.
Touch the metal frame Before reaching inside, your computer is safe.

Should you get up for any reason, walk away, then return, Touch the metal frame again)

You either have a 375 Watt, or a 425 Watt power supply.
I would recommend a power supply with more Wattage, and more Amp's on the 12 Volt power rail.

The Dell XPS 420 comes with an Intel Core2 Duo processor, or an Intel Core2 Extreme processor.

These puppy's can use a lot of power when gamin', or other intense programs are being used.

The Nvidia GeForce 8800 Series of graphics cards offered, use a lot of power when maxed out.

The motherboard with the Intel X38 motherboard chipset, uses a lot of power.

I would recommend a 600 watt power supply for a replacement.

My recommendation would be an OCZ StealthXStream 600W

Why?

1) If the temperature of this PSU is kept under 118 degrees Fahrenheit, the PSU can put out 728.8 Watts reliably. (47.9 degrees Celsuis)

2) It has Four - 12 Volt power rails.
EACH power rail can handle 18 Amps.
That's a total of 72 Amps!

3) It has all the power cables you'll need.

A) 20 + 4-pin ATX motherboard power cable
B) 8-pin 12 Volt power cable (8-pin EPS)
C) 4-pin ATX power cable
D) SATA power cables [ 3 ]
E) Peripheral power cables, (4-pin Molex) [ 6 ]
F) 6-pin PCI power cables. [ 2 ]

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3092557&CatId=106

Not advertising for the above website, nor the PSU manufacturer. Recommendation supported by personal preference, and experience.

Information about the various PC power cables and connectors,

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

Posted on Jan 04, 2010

  • 78 Answers

SOURCE: my dell xps 420 will not power on. power light

Hi
If your system's power light blinks amber, it means the computer is receiving electrical power, but an internal power problem might exist.

Do the following to tackle this issue:

  • If applicable, make sure that the voltage selection switch which is at the rear of your system matches AC power in your area.
  • Ensure that the power cable is securely connected to system board.

Here are links with pictures to assist you in opening the system and reconnecting the internal cables.
Please follow safety instructions before you perform these tasks. Here is a link, which gives you complete safety instruction.
http://support.dell.com/support/edocs/systems/xps420/en/OM/HTML/parts.htm#wp1372453
http://support.dell.com/support/edocs/systems/xps420/en/OM/HTML/parts.htm#wp1372490


Next is to see the system board design. Here is the link.
http://support.dell.com/support/edocs/systems/xps420/en/OM/HTML/parts.htm#wp1402834

and if you wish to research a bit more here is the link,
http://support.dell.com/support/edocs/systems/xps420/en/OM/HTML/trouble.htm#wp1076480
http://support.dell.com/support/edocs/systems/xps420/en/OM/HTML/trouble.htm#wp1097292


Here you will find complete manuals for further research
http://support.dell.com/support/edocs/systems/xps420/

If this does not resolve the issue, then the motherboard or processor is faulty and you need to get it replaced, so if your system is within warranty why pay extra, get it replaced from Dell. Else contact a local tech and he'll help you out.

Please rate as per the assistance level. Thanks :)

Posted on May 22, 2010

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I have Dell destop model XPS-420 my computer is not getting on NO FAN and no noise please advise me what should I have to do


hi

are you saying the fan is not working ? if that's the case, you need to replace the fan.
get the service tag # located on back of your desktop PC, go to this link below, place service tag in appropriate box . it will give you part numbers for the peripherals of this computer. locate the fan and purchase replacement.this is all you have to do. DO NOT TURN ON THE COMPUTER UNTIL THIS FAN IS REPLACED, or you will damage the mainboard and/or CPU.

http://search.dell.com/results.aspx?smh=sup&c=us&l=en&s=dfh&k=XPS-420%20&cat=sup

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1 Answer

My dell xps 420 will not power on. power light


Hi
If your system's power light blinks amber, it means the computer is receiving electrical power, but an internal power problem might exist.

Do the following to tackle this issue:
  • If applicable, make sure that the voltage selection switch which is at the rear of your system matches AC power in your area.
  • Ensure that the power cable is securely connected to system board.

Here are links with pictures to assist you in opening the system and reconnecting the internal cables.
Please follow safety instructions before you perform these tasks. Here is a link, which gives you complete safety instruction.
http://support.dell.com/support/edocs/systems/xps420/en/OM/HTML/parts.htm#wp1372453
http://support.dell.com/support/edocs/systems/xps420/en/OM/HTML/parts.htm#wp1372490


Next is to see the system board design. Here is the link.
http://support.dell.com/support/edocs/systems/xps420/en/OM/HTML/parts.htm#wp1402834

and if you wish to research a bit more here is the link,
http://support.dell.com/support/edocs/systems/xps420/en/OM/HTML/trouble.htm#wp1076480
http://support.dell.com/support/edocs/systems/xps420/en/OM/HTML/trouble.htm#wp1097292


Here you will find complete manuals for further research
http://support.dell.com/support/edocs/systems/xps420/

If this does not resolve the issue, then the motherboard or processor is faulty and you need to get it replaced, so if your system is within warranty why pay extra, get it replaced from Dell. Else contact a local tech and he'll help you out.

Please rate as per the assistance level. Thanks :)

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Low sound and buzz from speakers / Hum noise from sub-woofer


Select Start > (right click) My Computer > Manage
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Next to Sound, Video and Game Controllers click the + sign
A yellow triangle will signify a problem so if one is present, right-click that device and select Properties
You can then choose to update the driver
For more details check Dell Xps 420 Manual.
Dell Xps 420 Manual

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