Question about Dell Dimension 8400 power supply ** FREE ** (D8400SATA300W24PINB) Power Supply

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Dell Dimesion Serial adator fuse

My keyboard and speakers recently stopped working on my dell 8400.

I have tried both on another pc and these both work fine.

Boh devices use serial adaptors, could it be that the fuse for these cables has blown?/

if so is it easy to fix

Posted by on

  • davidcrsmith Sep 07, 2008

    TURNS OUT THE KEYBOARD WAS BROKEN





    HOWEVER I STILL HAVE THE SOUND ISSUE.



    SPEAKERS WORK ON DIFFERENT PC BUT NOT MINE, HAVE ALSO TRIED TO CHECK SOUND IN HEADPHONE SOCKET BUT THIS DOES NOT WORK EITHER

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  • 151 Answers

There is irq address poblem i think they get same irq address so that they stop to work.so you have to change these irq address. Hope this solution woks.

Posted on Sep 06, 2008

  • jitendra singh
    jitendra singh Sep 06, 2008

    You can check irq of these devices in device manager

  • jitendra singh
    jitendra singh Sep 06, 2008

    unplug one of them and restart your pc

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8400 dell hold power switch to get started


If it still acts up, compare wiring of the large motherboard Molex connector to the original. Dell used a variant that does not interchange. The enable wire is in a different location from standard ATX location.

If the processor is an AMD, remove cbattery and clear BIOS, and then try again.

Apr 07, 2012 | Dell Dimension 8400 power supply ** FREE...

1 Answer

My sons dell dimension 8400 let out a bang and now no power, the pc had froze and he had pushed the power up button on the front to turn the pc off any ideas?


Can you please describe what happens when you try to power on the system? Have you tried your system with a knwon-to-be-good power supply?

Feb 08, 2011 | Dell Dimension 8400 power supply ** FREE...

1 Answer

Can not get computer to power back up no lights on front o rear just little light on mother board have dell 8400


Bad Power Supply, sscorbett.

Usually you have enough power to light LED lights, (Like the harddrive activity LED light for add-in cards, that you see on the motherboard), and spin fans, but Not enough power to turn the Processor on.

Dell Support >Dimension 8400 > Service Manual

http://support.dell.com/support/edocs/systems/dim8400/SM/index.htm

Technical Overview > System Board Components

http://support.dell.com/support/edocs/systems/dim8400/SM/techov.htm#wp1052739

harddrive activity light for add-in cards (SCSI LED)

The Dimension 8400 comes with an ATX style of Power Supply, that has a maximum rated Wattage of 250 Watts.
1) ALL of the LED lights combined use less than 1 Watt of power.
2) EACH fan uses 2 to 3 Watts
3) A typical Processor can use 51 to 125 Watts.

Your Power Supply just has enough power to light that LED light.
Weak voltage power rail.
Replace the Power Supply.

[ There are three power rails inside that SMPS.
Switched-Mode Power Supply.

1) The 3.3 Volt power rail
2) The 5 Volt power rail
3) The 12 Volt power rail ]

The ATX form factor for a Power Supply refers to the size, and shape of the case, for one.
Approximately 6 inches Wide, 5.5 inches Long, and 3-1/2 inches Tall.
The ATX power supply case in the Dimension 8400 however, is shorter in length.
It is 4 inches Long. (Depth)

Not an advertisement for the website, nor manufacturer.
Reference for the case size, and power cables needed,

http://www.cputopia.com/hp-400w-dell-dimension-8400.html

Scroll down to see the connectors of the various power cables needed.

You may have a Power Supply with these dimensions, and needed power cables, in an unused computer.
Perhaps someone has upgraded to a better computer, and has an unused computer that you can temporarily borrow the Power Supply for a test unit.

Make sure it has at least 250 Watts (Maximum rated wattage), plus,

1) 20-pin ATX main power cable. (Or a 20 + 4-pin ATX main power cable)

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20

[ 20 + 4-pin ATX main power cable,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20plus4 ]

2) 4-pin ATX +12 Volt power cable

http://www.playtool.com/pages/psuconnectors/connectors.html#atx12v4

Plus the various power cables needed for the Harddrive, optical drive/s, and computer case fan/s, if it/they do not connect to the motherboard.

Oct 21, 2010 | 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

Dell Dimension 8400 power supply


Hi,
It not a common problem. The problem that you are facing is is beacuse of faulty motherboard. The blinking amber is caused , becasue the motherboard is not able to distribute the power signal to the devices . You can follow the link below to trouleshoot the problem if you are comfortable in opening the computer chassis

http://tinyurl.com/8mkpnm


Thanks
Proton

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

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...

1 Answer

Dell 8400 boot up problems


Hi,
There could be problem with the motherboard. You can try resetting the same.
1.Press F2 to enter the system setup.
2. Use the down arrow key and go to the option that says maintaince
3. Press enter and key down to the option CMOS defaults
4. Hit enter and reset defaults
5. Press escape and save changes and exit
6. check if the system boots up.


Before you perform the steps given above, unplug all external peripherals from the system like printers and webcams speakers etc. Your information is safe and there would not harm done to the information stored on the hardrive .


Thanks
proton

Nov 01, 2008 | Dell Dimension 8400 power supply ** FREE...

1 Answer

Dell Dim 8400 Issues


Hi Steve,
The problem that you are facing is most likely because of bad harddrive. As you have already replaced the RAM. To confim the same , run a diagnostics on the Hardrive. You can run the same in two ways .

Check if have the utilitu partision still left on the hardrive
1. Tap on the F12 key 5 - 6 times when you see the Dell splash screen , before windows starts to load.
2. Select Hardrive diagnostics or IDE diagnostics

If the above is no there , look for the dell Rescouce cd
1. Boot the system using the dell Resource Cd.
2. Select 32 bit diagnostics from the menu
3. Run a custom test on the hdd.

If the hardrive fails , replace the same, otherwise try swaping it connector cable with the optical cable.

Thanks

Proton

Oct 11, 2008 | Dell Dimension 8400 power supply ** FREE...

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