Quote:
Originally Posted by tw
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.
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Not sure how I'm going to test the voltages plugged in yet, I guess I'd have to contact on the solder ends on the other side of the board, whihc would mean a more major dissassembly job. I'll put some more thought into this.
I don't think there are external indicator LEDs on this model, maybe older or higher end models, think of the cents they save by not including them.
I see some models used the keyboard caps lock, num lock light as indicators, but not mentioned in the manual for this one.
At this base model it's barely worth changing anything but the power supply, certainly not to pay a professional to do it.
Dell Service code: JJ8FJG1