Question about Compaq Armada E500 Notebook
Thank you for your interest. Here is the order of events.The adapter was plugged in. The green led appeared on the adapter indicating ready. The cord was then inserted into the computer. The "on" button was pressed. The monitor turned on. The "Compaq" logo was briefly displayed. A low popping sound emanated from the machine. The sound appeared to originate near the "on" button area of the machine at the back. The computer shut off rapidly. I tried the power button again. No luck, it would not power up at all.The cord to the power adapter was then checked for integrity. The green light remained lit on the adapter. The cord was tested with my multimeter. Output voltage appeared normal. The battery was removed from the machine. The unit was left alone to drain any residual voltage. The power cord was reinserted. No luck. No smell of burning was ever discernible. I am at a loss at this point. Can you point me in a new direction?
The notebook does have an overvoltage and overcurrent protection inside the computer itself. The problem is definitely in your low voltage power supply section of your notebook. Since you do have a multimeter and know how to use it. Take your notebook apart so that you can see the board that your power adapter actually plugs into. Your notebook may just have a normal fuse that you can see is blown since they do make that little popping sound and do not leave any discernible smell of an electronic component that burned or blew up so to speak. That you cannot smell anything like that is good. If you do not see a regular fuse, there are what are called bell fuses that look like miniature glass diodes or resistors but are actually inline fuses. Your entire notebook should not have more than two or three. Sometimes they are made of ceramic, but that is only used for high amperage uses like on plasma screens and such. If the fuse is visible and checks blown try another one and watch it as you power the computer up. If it blows again check your on/off switch without power to your computer to be sure it is not shorted out. Then trace your voltages into your computer with power on and see where you do not get any voltage down the line. It is pretty straightforward in tracing the voltage from your adapter into the computer. Remember though that the intial voltage from the adapter is broken down into smaller voltages for the logic circuits. It is apparent you are not getting any voltage past right inside your computer's power supply and voltage regulator section. You in my opinion have an open circuit instead of a short right now. If you find fuse and it blows again then you have to find the shorted component. Let me know and I will be glad to help further. Good luck.
Posted on Jan 15, 2009
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