Question about Dell Dimension 8400 PC Desktop

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Dell Dimension 8400, no post. B and D amber.

Normal 0 I have Dell dimension 8400 3.2Ghz, 3GB ram, 512mb 8600GT Nvida card. Win XP SP3, 3.5 yrs old computer. When I push the power button I have no post, on back panel I see A - Solid Green, B - Solid Orange, C- Solid Green, D - Solid Orange. System seems to run as if it is booting up normal. I opened the box, cleaned all dust manually, removed MB battery, put all parts together it booted up fine. After a while I shut down the try to reboot and it would repeat with same error code on back panel. I tried same thing with removing battery to see if it boots but this time no luck. Any help would be high appreciated. TIA Ven

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  • venkiler Feb 06, 2009

    I did try swapping memory sticks, sometimes I get lucky if system turns on ok. Late last night I tried with one stick, it worked fine. I rebooted and I was able to work on my system but if I shutdown the system and try powering up with the same one stick it gives me same error. I get 1 long beep, 3 short fast beeps and again 2 long beeps. Is it possible that all 4 sticks have gone bad or is it just my MB? Thank you for your help.

  • venkiler Feb 06, 2009

    Does the bad slot means bad motherboard? I removed all parts off of the mb and took out the motherboard tray out of the box. I have not found any capacitors leaks. I am sure it is not PSU, video card or the CPU. It seems the memory sticks are good when tried on other dell system. I feel MB memory slots are fried? Its hard to get a replacement of this mb.

  • venkiler Feb 09, 2009

    Strangyman, I did try placing single stick on all slots. Repeated the same process with all 4 sticks. I get same beeps and back panel shows B & D in orange. It is strange that it boots ok after several tries of plugging & pulling out the cable. If I turn the system off after sucessful botting I won't be able to power up again. This sunday I got the system running, I did memory test, no errors found. I wanted to test the system to see if I get any blue screen or memory errors while system on full load. I played Battlefield 2 for 3 hrs, cod4 for an hour. Was able to watch movies and edit photos. All worked fine, no problems. It is strange why it gives me those beeps while booting if I can run the system well. I don't want to turn off my system, I will keep it running until it dies. I know I won't be able to boot it if I turn off the system. Please let me know if there are any tests that I need to do while the system is on.

    Oh, I called Dell sales to replace my fried MB. They are asking $156 + shipping. $156 is not wroth as I don't understand the problems with my computer.


  • venkiler Feb 12, 2009

    I have once again took off all the components, removed cpu and heat sink, cleaned applied thermal paste, got 500W new PSU. I first tried powering up just the MB no beeps, I placed CPU on MB and powered up I get beeps. 6 Long beeps G,Y,Y,Y. I tested again with 1GB stick on DIMM1. I get 2 long, 2 short, 2 long beeps backpanel shows G,Y,G,Y. I took off the CPU power connecter. From this I can clearly say that its not the PSU or the memory stick itself. I am wondering if its the bad CPU? I went throught each capacitors to see if any bulged or leaked ones, I found none. Why would I get G,Y,G,Y which is memory error beeps if its a bad CPU? I have another Dell optiplex P4 1.8 Ghz. Should I try placing that CPU on Dell 8400? Will P4 1.8Ghz work on LGA 775 MB? Any inputs would be a great help. I was think of getting a new board, now I am not sure?

  • venkiler Feb 12, 2009

    Let me correct my last statement...I took off the CPU power connector by keeping the memory stick on dimm1. I get no beeps. I get beeps only when CPU is connected.

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GYGY diagnostic lights -- Memory is detected, but a memory configuration or compatibility error exists, and the 1-3-2 beep sound indicates the MEMORY test failed, which means one of the four memory has gone bad or the one of the four slots on the motherboard has gone bad, Neither the memory nor the mother board has completely gone bad, but either one slot or one memory has gone bad, try placing one memory on all slots and check which slot is the issue, then trying placing any 3 memory on the remainig slot to isolate the memory, then after that use the best 3 in the best 3 slots and check, you computer should work fine, this would help you for sure

Posted on Feb 07, 2009

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According to this link you may have faulty memory:

http://support.dell.com/support/edocs/systems/dim8400/sm/adtshoot.htm#wp1052387

Try pulling the memory one stick at a time if you have more than one, or try swapping some from another system.

This is a good tool for testing memory if you can get it to boot:

http://oca.microsoft.com/en/windiag.asp

Posted on Feb 06, 2009

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  • RM Pro Svcs Feb 06, 2009

    The beep codes you describe are "Memory not properly identified or used".

    Try a different stick of memory and see if it goes away. If you get the same error with all 4 sticks, it could be that you have a bad memory slot. Try the sticks in a different slot and see how the system works.



  • RM Pro Svcs Feb 06, 2009

    Most likely yes, if the memory works fine in other systems. It could be the slot or something in the memory subsystem that's gone bad. Motherboard replacement is about your only option.

    Try your local craigslist for a used one maybe? Or take your motherboard to Fry's or local computer place to see if you can find a compatible replacement.

  • RM Pro Svcs Feb 09, 2009

    Hmm, that changes the picture a bit. I wonder if it could be the power supply? Or maybe a voltage regulator on the motherboard...if it's not getting a good 5v signal from the power supply on startup, but it's stable other times.



    Might be worth trying to swap a power supply from another PC if you have one, see if that helps.

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1 Answer

Set up cd rom dell dimension 8400


Hello Download drivers here at dell:

http://www.dell.com/support/drivers/us/en/19/Product/dimension-8400

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1 Answer

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Henry,

The Amber A and C signifies a failure to post. Computers Post BIOS to Processor, then RAM, then back to Processor before initializing the other devices. Try reseating the RAM or replacing it before you go further.
If you have upgraded the devices within the PC recently, you should consider that you should not be running anything less than a 350W power supply.

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Oct 28, 2012 | Dell Dimension 8400 PC Desktop

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http://www.dell.com/support/drivers/us/en/19/Product/dimension-8400

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1 Answer

Dell dimension 8400 blinking amber light ethernet port


An Amber blinking power button indicates a low voltage problem. This can be caused by a defective power supply or a defective motherboard. Since you replaced the power supply, my guess is that the motherboard has a problem.
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Jul 27, 2012 | Dell Dimension 8400 PC Desktop

1 Answer

Dell 8400 dimension desktop on start up the fan runs at top speed like a jet engine taking off, and power light is constant amber with a blank screen. I have removed ram and grafics card etc and replaced...


Your power supply or motherboard has a problem. You can try getting a power supply on the internet ( $25 to $75) first. If no go then motherboard (about $100 to $200 ). The 8400 is about 6 years old which is the average lifespan of computers. One last thing you can try is removing the heatsink assembly and re-seating the processor. You have to clean the old thermal compound from the CPU chip and heat sink and reapply the compound (thermal paste). You might be better off buying a new computer from Walmart.

Feb 26, 2011 | Dell Dimension 8400 PC Desktop

1 Answer

My 6 year old Dell Dimension 8400 quit working completely.


Depending on the symptoms, you may have different faults.
http://www.fixya.com/support/r4282412-find_no_post_diagnostic_information_dell
Flashing Amber power LED, normally power supply
AAGG Diag LEDs normally bad RAM
Solid Amber Power LED, bad motherboard or Expansion card connected to it.
If you need a motherboard a Precision Workstation 370 motherboard is essentially the same and is available, (8400 motherboards are scarce)
http://shop.ebay.com/i.html?_kw=T7787&_kw=DELL&_kw=Motherboard

Feb 05, 2011 | Dell Dimension 8400 PC Desktop

1 Answer

My dell dimension 8400 canot boot up at all and the Diagnostic Lights not light oso..so wat i can do?


The POWER and DIAG LEDs can give you information. If no DIAG LED look at the POWER LED
http://www.fixya.com/support/r4282412-find_no_post_diagnostic_information_dell
Flashing amber, most likely the power supply
Solid Amber, motherboard or item plugged into the motherboard (Expansion card, external connection etc.)

Apr 17, 2010 | Dell Dimension 8400 PC Desktop

1 Answer

Dell Dimension 8400 Won't Boot Up


call dell first tell them the problem,they should help you,or use chat i use that sometimes.

Apr 18, 2009 | Dell Dimension 8400 PC Desktop

1 Answer

I'm having an issue reinstalling Windows XP on a Dell Dimension 8400 PC.


Okay you need to boot from cd
put win cd in drive restart when asked to boot from cd hit enter
this should get you there
if not we'll have to change your boot options

Jan 15, 2009 | Dell Dimension 8400 PC Desktop

4 Answers

Woes with Dell


If the power light is steady amber, a device might be malfunctioning or incorrectly installed.

Disconect fan , see if it starts.

Jan 13, 2008 | Dell Dimension 8400 PC Desktop

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