Question about Dell Dimension 4700 PC Desktop
This problem has repeatedly been reported with this model and the 4800. People will tell you it's the power supply, motherboard and CPU. It is none of those. Your CPU cooling tower has been jarred loose. Dell made these things way too big, and as a result a simple bump to your case can make everything go crazy. Remove your fan shroud, then the fan then the cooling tower, cleaning each as you go.
Now remove the large cooling tower. Remove, clean and reseat your CPU, add NEW thermal paste and reassemble everything and keep the PC on it's side. The system should now be able to reboot. In extreme cases of jarring such as the PC has been dropped etc, your motherboard may have been damaged. In this situation it is best to buy a new motherboard and transfer all your components to the new board. So far, I haven't had to do this though. Most of these PC's come back to life easily with the steps I just mentioned above.
Posted on Aug 30, 2010
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Posted on Jan 02, 2017
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