I am diagnosing an HP netbook (model 110-3735DX) that has a 19 volt external power supply/charger like most laptops have. I get 19 volts from the power supply/charger when it is not connected to the computer.
The system board has been completely removed and there is no RAM in it and the battery is not connected.
When I read the voltage at the power supply connector on the system board, I get a reading that changes quickly with these values; .9, 1.3, 3.4, and it basically loops like this. The voltages are usually no less than .9 and nothing usually over 3.5. I do not get any lights on the system board.
I assume this indicates a problem with the 3.5 voltage section which is trying to start but keeps shutting down for some reason. Does that seem like the most likely problem? Is there anything else that symptoms like this would typically indicate?
I have also noticed that 1 or 2 capacitors on the board are much warmer than anything else on the board. They are both very close to each other are get to a temperature of 102F. They are located close to the power supply connector. Would it make sense that one of these is most likely cause the issue, or could they just be a symptom of something else that is failing?
I am a beginner in electronics. Although I have watched and learned much from many repair videos, and I have only successfully diagnosed and replaced a few capacitors on a few older boards.
I hope this is the right forum for this topic.
The system board has been completely removed and there is no RAM in it and the battery is not connected.
When I read the voltage at the power supply connector on the system board, I get a reading that changes quickly with these values; .9, 1.3, 3.4, and it basically loops like this. The voltages are usually no less than .9 and nothing usually over 3.5. I do not get any lights on the system board.
I assume this indicates a problem with the 3.5 voltage section which is trying to start but keeps shutting down for some reason. Does that seem like the most likely problem? Is there anything else that symptoms like this would typically indicate?
I have also noticed that 1 or 2 capacitors on the board are much warmer than anything else on the board. They are both very close to each other are get to a temperature of 102F. They are located close to the power supply connector. Would it make sense that one of these is most likely cause the issue, or could they just be a symptom of something else that is failing?
I am a beginner in electronics. Although I have watched and learned much from many repair videos, and I have only successfully diagnosed and replaced a few capacitors on a few older boards.
I hope this is the right forum for this topic.
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