Question about Dell Dimension 4700 PC Desktop
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
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
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
Take a look at this website:
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
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
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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Posted on Jan 02, 2017
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