Having problems with your Dell Dimension 4700 PC Desktop ?

Won't turn on only blinking yellow light

\015 I have a dell pc Dimension 4700. the thing will not turn on and when i press the power on i only get a yellow blinking light where the power is suppose to be. i get no image on the monitor or no beeping sounds just the light. what can i do and thank you for the help\015

Answers :

The blinking yellow light on the power button is almost always a power supply failure of some kind. You should try disconnecting the PC from the wall and letting it sit for 10 minutes to let all the power in the capacitors drain. This will do a mini-reset on the power supply. Plug the power back in and then try it again. If that doesn't work, find the 110/220V red switch on the power supply, unplug the power from the wall, flip the switch a few times, make sure it lands back on 110, then connect the power and try turning it on again. If those don't work, you'll need to replace the power supply unit.
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!
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