Question about Dell OptiPlex Computers & Internet
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: Yellow blinking power button
A customer of mine has several of these that have the same problem. I found a comment on a Dell forum indicating that one of the capacitors on the mainboard will be either swollen or leaking. Replace the capacitor and it should be OK. I do not have the proper equipment for soldering on a mainboard so I have not done this. However, I did a google search on "Dell SX280 mainboard purchase" and I found a guy on ebay selling the repaired boards for $100.
Posted on Sep 18, 2008
Another problem with the Dimension 4700's are some of the capacitors. There are a few that cause problems and prevent the machine from powering on. Check the single large brown capacitor next to the black heatsink. If you see the top bulged or stuff leaking out, there's your problem. The other two that tend to blow are in the bank of capacitors right next to the CPU. Look for the two tallest ones and check for bulged caps or leakage. Replacing them is really not a difficult fix as the Caps are readily available and it isn't hard to solder them in. Alternatively, you can hit an electronics shop and see if there's someone who can charge a nominal fee to replace them.
I've repaired two 4700's with similar problems this way.
Best of luck!
Posted on Aug 29, 2009
open the tower//
check for any loose connection of the cord of Hard drive and power unit//
better option is take out the wires one-by-one and refix it//
if this does not work then probably the SMPS has gone bad and needs to be replaced..SMPS is the power unit which supplies power to all the component.
during all this process please alwaws make sure that when you put ur hand in the tower then the power cord should be out , otherwise you can get power shock.
Posted on May 15, 2010
Tips for a great answer:
A solid green light means the computer is operating normally.
A solid yellow light indicates the power supply is operating normally but the computer is not processing data.
This could mean there is a problem with the CPu or another component on the motherboard.
((A blinking yellow light indicates the power supply is receiving power from the wall, but not functioning properly.
This generally means the power supply itself is bad and should be tested or replaced.))
A blinking green light means the computer is in standby mode.
You should consider visiting Dell Support and downloading the manual for your
your Dell computer. So use the LED power light codes if your Dell computer has them.
hope this helps
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