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Beep problem Dell Dimension 4700

I have similar issue. It's the second time around. Earlier this year, it happened to my Dell Dimension 4700. It boots, but the monitor doesn't. I get 6 beeps like 1 234 56. Then the AB lights are yellow and the CD lights are green. Needless to say the fan goes out of control. Techs came to fix it, and all I know was that they changed memory cards, later HD and at the end the motherboard. But no explanation of what was causing such problem. Now, I'm having the same problem. Can anyone help me figure this out. I tested HD and it is working, changed memory cards and beep still going. Thanks for the help in advance

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  • Skorp62wm Dec 19, 2007

    I did purchase a new pair of memory cards to replace the old ones but that didn't work either. All lights and beep points to memory but if is not the cards... what could be??? If I go ahead with getting a new motherboard, don't know how effective that will be???

  • Skorp62wm Dec 20, 2007

    I reseated the original cards, used one at a time and swap places as well. That didn't work. The system operates with DDR II SDRAM 533MHz PC2- 5300 2x256 512MB (original), new ones are the same but upgraded to 2x512 1024MB (trying to help). The system is Hyper-Threading Tech, Socket LGA775 Supporting P4 2.8 - 3.8 GHz. All front lights are green, no blinking, back panel lights A,B remains yellow, C,D are green.



    I have not pulled all the memory out and tried to boot, will give that a try and let you know.



    Also I read an article which I found interesting (I'm no expert so all reasonable info helps) and would like to share it as info material http://www.theallineed.com/computers/050...



    Thanks and I will let you what happened with this last boot.

  • Skorp62wm Dec 20, 2007

    I pulled all the memory and tried to boot (with no memory cards), no luck, still have the beep and same lights... I think at this point is the MOBO, but don't know... any ideas???

  • husker1a Dec 27, 2007

    Same problem exactly...just happened to my wife's 4700. Just started looking here for clues.

    George

  • Skorp62wm Dec 31, 2007

    First, I want to thanks ohiotom for your help last week, very helpful advise. FYI, after all the work I decided to go for the MOBO. That was the problem, got a new one and now I'm up and running. I still don't know what caused the MOBO to go, but now I know to check Hard Drive and memory cards and if they are fine... and you still get the beep and lights pointing to memory problem... likely is the MOBO. This is the second time in 2 years. I like my Dell 4700 but it has it's problems.

    Thanks

  • missoctober Feb 01, 2009

    Hey, I had the same problem on the same Dell today, I called my brother who builds computers, he told me to take the left side of the tower off and look to see if all the memory and the video card was in and not loose. I did that then I took my 'RAM" stick out and put it back in. I waiting 30 min and now it works fine. Maybe this will help.

  • johnathancoo
    johnathancoo Sep 28, 2013

    Here's a pic from the technical manual at the Dell website.

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Beep problem update - Dell 4700. Last night started computer - cold boot. The screen had just started to light up and then went black and computer started beeping in an interrupted sequence. Fan speed increased considerably (suggesting overheat?) Shut it down and attempted two restarts with no success. This morning I unplugged all cords, opened case, pulled and reset memory cards and vacuumed inside. The computer was very clean so really don't suspect that dust was an issue. Buttoned it back up plugged in plugs and restart successfully accomplished. Have no clue why. Some square electrons, I guess.

Posted on Dec 27, 2007

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My 4700 has the same symptoms: on power up, I can hear the hard drive starting to spin, but then the fan goes to full throttle. The PC just sits there with the CPU fan ready to take off. The diagnostic LEDs are all off. Previously the PC would start normally every other time, so I thought the fan was the problem. I replaced the fan and yes, I found out the fan on the 4700 was installed wrong at the factory. I corrected that with the new fan, but that did not solve the problem. Now, I has gradually gotten worse to the point that it now rarely powers up normally.
I took the whole thing apart looking for suspicious solder joints, or puffy capacitors, anything. Vaccumed everything, reassembled, still no cigar.Then I started checking all the ICs for one that could be doing the fan control. I found that this IC marked LPC47M584 has some fan control functions. Unfortunately the manufacturer, SMSC, does not have the datasheet anymore and Google was of little help. Doing a continuity check, I found that two of the pins in the CPU fan header connect to this IC (besides ground, which is the middel pin). I "refreshed" the solder connections to this IC, reseated everything, but still no solution. I figured the next step is to replace the motherboard, so I ordered a brand new one. It will be here next week. I'll let you know what happens. -Tony

Posted on Nov 15, 2008

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Take a look at this website:

http://www.webmadeeasy.net/ComputerDocs/Dell/Dimension/4700/ServiceManual/adtshoot.htm#wp1052968

Looks like a memory failure. When you say you changed the memory cards, what do you mean, did you just swap them or did you put entirely different ones in?

Posted on Dec 19, 2007

  • ohiotom Dec 19, 2007

    Two more questions,



    What type of memory did you buy? Did you insure it's compatible with your motherboard?



    Have you pulled all the memory and tried to boot to see what happens?

  • ohiotom Dec 20, 2007

    Well it sure sounds like it... I would unplug everything else (video, HDD's, CDROM/DVD, any PCI boards) and try it one last time. If it does the same thing then the motherboard is the only candidate left.



    Just curious, did you ever update the BIOS during any of this? Just wondering if it did not flash properly. Once that happens it's a brick.

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Wow you guys are amazing!! Thank you so much. My brothers Dell Dim 4700 did the exact same thing I took the cover off, got rid of the dust ( and dog hair!), pulled the cards out, reset them and BOOM it worke!! Thanks loads! Love it when something comes together.

Posted on Oct 22, 2009

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I just took out 1 of the 256 mb and my cpu works with only 256 mb lol... it's more like the momory card slot thing because i tried to put 1 memory card slot on the left 1 and it beeped

Posted on Jul 10, 2009

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