Question about Dell Dimension 8400 PC Desktop

1 Answer

Burned pins on psu

Hi when my dell 8400 went dead i decovered 2 pins from the 4 pins on the psu connector is badly burned looking at the connector on the mb there is slight burn damage would the mb also be fried now do i get a new psu and discover the mb is also fried and possibly other damage. would be greatfull for any asst recom

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 2,961 Answers
Re: burned pins on psu

The reason for the melting could be down to one or the other, i would deffinately change the motherboard as it may be the reason for the melting and just keep an eye on the PSU

Posted on Sep 25, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

My HP Slimlines5220Y shut down and has a burn smell to it. What could be causing this?

Looks like you power supply blew up. If you are familiar with electronics get a cheap PC PSU tester. Remove side panel detach the 20-24pin ATX connector and 4 pin CPU power connector; attach them to the tester and connect PC to the mains to see what (if any) voltages are absent. If yes you have to order a new PSU. If the tester shows your PSU is okay or if these instructions seem "mumbo jumbo" to you then you'd better contact HP support ;)

Aug 01, 2015 | HP PC Desktops

2 Answers

Amber flashing light GX620

LOL... If you haven't already fried your motherboard by using your modified PSU (And that's a big IF), then you need to buy a new PSU with similar specs and connection plugs (ie. a 24pin main) as the original PSU that came with the PC.

May 31, 2012 | Dell PC Desktops

1 Answer

Power button on dell 5000 flashing amber

***I'm pretty sure your power supply is dead, you will either #1 take to repair shop or #2 replace it yourself.

The Best Value 550W Gold PSU 12cm 24-Pin 550 PSU is compatible.

The Corsair Memory 550W VX PSU is compatible and Corsair is an excellent brand, but you may have an issue locating the excess power connectors inside the case.

The Xilence XP480-12R Power 480W Quiet PSU would be fine, providiing the "hard drive connectors:2', are 4-pin Molex connectors.

Aug 04, 2011 | Dell Dimension 5100 (D51L1) PC Desktop

2 Answers

One of my disc drives on my Dell Dimension 8400 is stuck open. i have a Lite on Model LTN-486S that i took out of a Dell Dimension 4800 that was broken. is it compatible with mine?

Should work fine. Only issue you may run into is getting the cable settings (master / slave) set up so everything shows up. Most likely if you're replacing an existing one you can get away with just setting the new drive to cable select or what the previous drive was set to though.

Please leave feedback if this was helpful.

Mar 18, 2011 | PC Desktops

4 Answers

Power supply fan is loud!

Essentially any Standard ATX power supply with a rating of 250 Watts or higher will work

Feb 04, 2009 | Dell Dimension 1100 PC Desktop

1 Answer

No power supply to the tower

Be sure that the ATX or BTX power cable (the rectangular cable with 20 or 24 pins) is securely fit into the motherboard. Re-seat it if needed. Also, check the +12V 4-pin adapter (if exists) is seated, just like the 20/24 pin is. If that doesn't solve the problem, be sure that the PSU is switched on and is at 120V (USA) before plugging in the power cable. If that doesn't work, contact the computer manufacturer or the PSU manufacturer (depdending on what you purchased.)

Hope this help!
Robert W.

Jan 09, 2009 | Dell Dimension 8400 PC Desktop

1 Answer

New psu for Shuttle XPC SB81P won't work!

Try these:

Remove the PSU from the case.
Plug it to power.
Turn it on
Using a paper clip, short circuit the green wire pin with the the black wire pin on the 24 pins connector.
If the PSU fan start, remove the clip. The fan should keep spinning. That means that the PSU is working.

If the PSU is working, then the power up pins on the mother board might not be shortcircuited by the front panel switch.

Connect the PSU to the motherboard and to the power, turn it on. On the motherboard, locate the power up pins and short circuit them with the paper clip. If the computer powers up then there is a problem with the power on switch.

If the PSU does not start at all, return it.
If you can't return it, unplug from power, open it (warrenty voids!) and look for a fuse that looks like a one inch glass tube with metal caps. inside should be a wire. If the wire is broken, buy a new fuse in Radio Shack.

Hope that helps.

Dec 28, 2007 | PC Desktops

2 Answers

Emachines problem... PSU works but comp doesnt turn on

Hi, Did you just add the second CD? If you did you may need the driver for the mother board? Make sure the power cord for the cd has voltage plug it into the DVD drive also check the cable make sure red stripe is on the correct side of drive. You can download the driver at User guide is there as well. The start button has a pair of wires with a small pin connector on it. This will connect to the motherboard if there is a 3 pin set you might try moving to the other pin. The new power supply also has to provide a start voltage? Your power supply may not be compatible or it may put the voltage on the third pin.

Aug 22, 2007 | E-Machines eMachines Desktop PC

Not finding what you are looking for?
Dell Dimension 8400 PC Desktop Logo

Related Topics:

59 people viewed this question

Ask a Question

Usually answered in minutes!

Top Dell PC Desktops Experts


Level 3 Expert

5660 Answers


Level 3 Expert

18259 Answers

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers

Are you a Dell PC Desktop Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides