Dell xps 420 noisy fan black screen

SOURCE: dell xps 420 desktop want go into windows mode or reboot

Try clearing the motherboard state:

unplug power cable
hold power button 15 seconds
release power button
plug in power cable
start as usual

As much as these issues can be as drastic as noted above, this is rarely the case.

finnaly, please post some more info, do any lights come on?

The power light can be different colors and may blink, and there are diagnostic lights on the front (usually marked 1,2,3,4).

SOURCE: xps 420 keeps freezing or going to blue screen

change/clean the cpu fan or try to reduce heat arround the processor

joecoolvette

• 5660 Answers
• Posted on Jan 04, 2010

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

SOURCE: dell xps 420, won't finish loading bios boot

see if this info helps narrow down the failure

http://www.fixya.com/support/r4282412-find_no_post_diagnostic_information_dell

SOURCE: Dell XPS 420 won't boot at all not even a BIOS screen

the bios is not starting ...
check the memory ram if its inserted correcly or
chek the beeps wen cpu starts and

http://kb.iu.edu/data/afzy.html

se if tha link is help full