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Dell Dimension xps R450 won't boot

After power on, there is no video, the floppy and DVD lights are on briefly together then go off, no beeps (usually indicating floppy drive and keyboard have been checked). The hard drive access light stays on for a few seconds and then goes off. The keyboard lights are on and stay on. It appears the normal boot sequence is not being followed. Is there something that can be done to localize or diagnose this problem?

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  • S_Nandha May 11, 2010

    When you turn the computer on does anything at all come on the screen?

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MAYBE A POWER SUPPLY PROBLEM OR THE CMOS BATTERY IS OUT OF JUICE, YOU DIDNT KNOW THAT YOU HAVE A BATTERY THAT KEEP EVERY THING WORKING RIGHT.

NOT KIDDING

CANDYMANGANDY

Posted on Jan 29, 2009

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Posted on Jan 02, 2017

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2 Answers

Computer acts like it in standby mode will not power up, made a weird noise according to my daughter and quit


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 will help
don

Feb 23, 2011 | Dell Dimension 4400 Power Supply ** FREE...

1 Answer

Computer will not turn on ? checked outlets,cleaned out computer , unplugged everything nothing connected to computer


Test your power supply unit if the PSU units fans not working its faulty

One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect your hard drive boot up

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 or just replace them they are probably old and faulty ?
one bad lead will end with a computer error
hope this will help
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Feb 17, 2011 | Dell Dimension 8400 power supply ** FREE...

1 Answer

Dimension 4400 won't boot and the Flea light is amber


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

Feb 05, 2011 | Dell Dimension 4400 Power Supply ** FREE...

1 Answer

My Dell 8400 won't turn, no fan, anything.


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 or boot up your hard drive

Test all leads that attach from the ((motherboard 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 or just replace them they are probably old and faulty ?
dont forget to vote
hope this helps

Feb 05, 2011 | Dell Dimension 8400 power supply ** FREE...

1 Answer

Replaced the dell 8400 power suppley, -now system says floppy disk failure (I don't have a floppy) CD R/W have power, but don't work? Is there a schematic available?


Hello my friend probably is a bios setting,somehow you hit default settings or flash your bios and you turned it on.Go into bios(hitting del on boot) and on the general page there will be a setting for a floppy drive, likely something like floppy 3.5" 1.4mb choose it and hit enter and you should be able to disable the floppy drive.If there is no setting, look for a HALT ON ALL ERRORS setting and change it to keyboard onl.

Feb 06, 2010 | Dell Dimension 8400 power supply ** FREE...

1 Answer

What is the 6 pin


You can replace the power supply in this Dell with a normal ATX power supply. Make sure the total wattage is equal to or greater than the old power supply.

Oct 02, 2009 | Dell - NPS-200PB-73M (NPS200PB73M) Power...

2 Answers

Dell Dimension power problem


There are several different solutions for this as posted at this Forum.

http://www.tomshardware.com/forum/51352-2-dell-dimension-8400-wont-boot

1) A lot of people have just removed the Jumper for the CMOS and turned the Power back on and back off and replaced the jumper and/or removed the battery.

2) Several people have reseated the Memory and after booting back up it worked.

3) A few had to replace the Mother Board and CPU but in this instance they had to also replace the Case because the Dell case wasn't really fit for the heat of from the CPU.

4) I had the exact same problem and luckily replacing the Power Supply fixed this for me. I had to cut out the back of the Dell case for the toggle on/off switch but when I tested the old Power Supply it was only getting 5amps and this was causing the Amber/Orange/Yellow light to constantly flash.

I hope this helps!

Jan 20, 2009 | Dell Dimension 8400 power supply ** FREE...

3 Answers

Have a yellow amber light blinking


A Blinking Amber or Yellow power button means that the power supply is receiving power from the source but is unable to properly distribute it to the components. This can be caused by a defective power supply or a defective motherboard. Just to make sure that nothing else is causing the problem, remove any PCI cards like modem, video card, sound card, etc... Remove the memory modules and disconnect cables to CD/DVD drives. Look at the USB ports to see if any are damaged.


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Dec 25, 2008 | Dell Dimension 8400 power supply ** FREE...

3 Answers

Dell Dimension 4400 Won't Turn On


inside the pc there should be a green light. called flea light. if its not on.. then id say motherboard or power supply are bad.
take power cord off. and hold power button down for 10 ecs. then reconnect and retry. i think its abad psu.

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