Quote:
Originally Posted by Beest
5.02V on purple
3.45V on green
0V on grey
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So far, good. The black probe could also be connected to the chassis.
Now follow those directions. Measure the green and gray wires
both before and when the power switch is pressed. Note the behavior on each wire as the power switch is pressed.
Obviously the system will not load and execute tasks. Whereas that third step is valid for BrianR, it is different for you. What does any one yellow, orange, and red wire do when the power switch is pressed? For example, do each start to rise and then fall? Does any one not move? Or do all not do anything?
Diagnostic LEDs are not inside. From one Dell service manual: "your computer is equipped with four lights on the back panel labeled "A," "B," "C," and "D." These lights can be yellow or green. When the computer starts normally, the lights flash. After the computer starts, the lights remain green. If the computer malfunctions, ..."
To say more unique to your system requires the Service Tag number. Often a label somewhere on the side or back of a Dell Desktop. And often found on the underside of laptops.