Having problems with your Dell XPS 420 PC Desktop ?

I tried turning on my my xps 420 and it won't boot up. The fan seems to be running very fast and nothing else happens


Answers :

Gengleb
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\015\012In regards to your system not booting up there could be a couple of things that could be wrong with the system. The 2 main ones would be a hardware problem with the system (if the fan keeps running fast until you turn off the power then most likely this is the issue) or a problem with Windows.
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\015\012However if your computer is still under warranty with Dell I would contact their support first because we do not want to have you do anything that could void your warranty at this point.
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\015\012Now if you are out of warranty then let me know and/of if you have any questions about what Dell support asks you to check.
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\015\012Issken
When the system does this it is getting locked up at initial post. On these uints when post is successful and the system load the fan control settings the fan will slow.
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\015\012Since your system is not making it past post we will start with the beginning basics.
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\015\012Uplug the system from the wall. Hold the power button down for 20 seconds to clear the system of power and drain the power supply. plug in the system and turn on.
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\015\012If the system does not power on the next steps will depend on if you are comfortable opening and working on the unit.
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\015\012clear the bios
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\015\012to do this open the side case and lay the system down. look for the jump that is marked CMOS and switch it from the current pint to point the middle and open pin. put the power on and hold it. Then unplug the unit and repeat. Replace the jumper to original position then hold the power button. plug the system back in and try to boot.
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\015\012if this does not work more on
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\015\012checking memory
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\015\012make sure the system is off. remove the memory from the system and turn it on. if the system makes noise than this is good, if it does not then your CPU or motherboard is mostlikely damaged.
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\015\012if you do have a sound, turn off the system. if you have 1 memory stick place that memory in the slot that is not used and try to boot. if this does not work move on
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\015\012if you have more than one stick try the alternat stick in slot one then slot 2. go through each stick in the same way to tyr and get it to boot.
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\015\012if ths does not work move on.
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\015\012Remove all expansion card
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\015\012if you have expansion cards liek a lan card, wireless,, or modem in the computer or any other expansion card other than the video card, remove them all and try to boot. if you succeed then you need to test each card 1 by one tilyou find the one causing the issue.
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\015\012If all of the above fail then there is a big chance the Motherboard is bad and you will need a replacement. Usually the CPU does not go bad, this is rare.
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\015\012The only last thing you can try with minimal knowledge is to take off the cpu heatsink and then reseat the cpu but you must be careful cause you can damage the chip
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