Question about Dell XPS 730X Desktop Computer
My Dell XPS 730 turns on and fans run but has no display the power light is yellow instead of blue and its not booting all the way I think, the fans keep running as if its just turning on
Indicates a bad Power Supply.
Weak voltage power rail
[There are three main voltage power rails;
3.3 Volts, 5 Volts, and 12 Volts. All are DC.
In comparison two D cell flashlight batteries produce 3 Volts DC.
The Power Supply is a converter. Converts 100 to 240 Volts AC, from your home, or business; and turns it into the low DC Voltages stated above.
Japan - 100 Volts AC
US - 120 Volts AC
Europe 240 Volts AC
Australia 240 Volts AC,
Indication is that it uses a 1000 Watt power supply.
Power Supply Unit (PSU)
"The Dell 1000 Watt PSU is an oversized (taller and wider) than standard ATX power units, although it does use the standard ATX bolt pattern to bolt it to the chassis."
According to the specifications, the Dell XPS 730 comes with two Nvidia GX2 9800 graphics cards, and they are connected together using SLI.
[Scalable Link Interface,
One Nvidia GeForce 9800GX2 needs a minimum power requirement, of 580 Watts.
Using two in an SLI configuration, requires at least 850 Watts.
If your computer has an Intel Quad Core processor, 1000 Watts is about right.
Power for the;
Motherboard, Processor, optical drives, Card Reader, Ram Memory, and two of the 9800 GX2's.
Since the Dell XPS 730, does have provisions for using a standard ATX power supply, this means any Ol' ATX power supply can be used. Mounts (Bolts) right up to the computer case metal frame.
We are looking at a 1000 Watt power supply. Can you say Ouch?
Do you have access to a multimeter? I can guide you in testing the three main voltages.
This way we can determine if I am correct, and won't waste your hard earned money.
(An economical multimeter can be purchased for as little, as $5 to $12. Available in a multitude of stores. An auto parts store is but one example. I have seen them on checkout aisles in major discount stores, also )
Computer also needs to be clean inside. Especially the Processor fan, and the finned Heatsink.
Use a can, or two of compressed air for computers.
(Attach the plastic straw, break the plastic lock tab off of the top of the nozzle)
Your body carries Static electricity. Static WILL fry out (Short Circuit), the delicate hardware components inside a computer.
Relieve your body of Static BEFORE reaching inside your computer.
Computer ON a table, computer Unplugged from power, computer case open;
TOUCH an unpainted surface, of the metal frame of the open computer case.
This action will relieve your body of Static.
IF, you leave your computer in the middle of working on it, be SURE to Touch the metal frame again, upon your return.
Main Support page,
Download page for the Service Manual, (PDF file form),
Service Manual (2608KB)
Right column - Replacing the Power Supply
For additional questions please post in a Comment.
Posted on Nov 27, 2012
One bad or faulty lead connection can cause a computer to continue restarting on a cycle or to shutdown or fail to detect your hard drive. WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL. Test all power and data leads that attach to your hard drive IDE,SATA the leads from your (motherboard to your hard drive) make sure they have secure dust free connections and are not faulty if its a 40 pin flat ribbon type it will be the first to fail 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 something as small as a faulty electrical fan and its lead can cause you problems computers need all power and data to continue through every working device and to have an end so any faulty leads will end up with a computer error make sure your graphics card is securely seated with no dust built up or in the socket if you remove your graphics check the socket to make sure its dust free restart your computer then reinstall it this should activate found new hardware wizard
Hope this helps.
One bad or faulty lead connection can cause a computer to continue restarting on a cycle or to shutdown or fail to detect your hard drive.
WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL.
Test all power and data leads that attach to your hard drive IDE,SATA
the leads from your (motherboard to your hard drive) make sure they have secure dust free connections and are not faulty
if its a 40 pin flat ribbon type it will be the first to fail
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 something as small as a faulty electrical fan and its lead can cause you problems
computers need all power and data to continue through every working device and to have an end so any faulty leads will end up with a computer error
make sure your graphics card is securely seated with no dust built up or in the socket
if you remove your graphics check the socket to make sure its dust free
restart your computer then reinstall it this should activate found new hardware wizard
Posted on Nov 27, 2012
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Posted on Jan 02, 2017
sounds to me like the fan is on the way out ,and if the cpu gets too hot the pc will shut down.
check that the fan is not obstructed,clean it if it is full of dust, replace it if it is not working as it should.
also listen to the power supply fan, is it working ok,this could cause the same type of problem but for different reasons.
Posted on Mar 12, 2008
Check motherboard for bad capacitors. I had the same problem and when i had bad capacitors replaced everything is ok.
Posted on Feb 20, 2009
I have an HP that does close to the same thing. Mine goes into a 'Perm-Sleep' mode that I can't seem to pull it out of. I have to remove the battery, then unplug the power adapter, not in that order. Leaving it in this condition for about a minute so that all the power stored in the RAM goes away. This is the same as holding the power button down for 10 to 15 seconds until it completly turns off, sometimes referred to as a 'Cold Boot.'
Once I have powered it down I have to go into the control panel and select the power settings and make sure that hibernate is not an option. If you close the lid on the laptop and the systems goes into a sleep state, it may be configured to go to hibernate after, say an hour or when the battery gets close to being drained. My computer does not like to come out of hibernate and I have to Cold Boot it, so I just don't let it go into a hibernation in the first place anymore.
Posted on May 10, 2009
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,
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
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 ]
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,
Posted on Jan 04, 2010
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