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Diagnosing DEAD DV6103nr - DV6000 series

post #1 of 6
8/22/09 at 12:09pm
Thread Starter 
As payment for another job, I took a dead HP DV6103nr. I am trying to diagnose if its the motherboard or something else.

- The notebook is completely dead, no lights, won't power on.
- I get 18.9 volts from the end of the AC adapter power tip where it plugs in.
- I have completely disassembled the notebook. I get 18.9 volts through the USB/Power Jack board, which is separate on this notebook, all the way to the motherboard.
- When I disconnect the USB/power jack board from the MB, and plug in the AC adapter, the blue light on the USB/power jack lights. As soon as I connect it to MB, lights out.

Would this indicate replacing the MB?
Anyone have any experience with this? Thanks!
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post #2 of 6
8/22/09 at 12:15pm
. Possible.

. How about replacing the power jack first? Cheap investment. Then try with another ac adapter.

cheers ...
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post #3 of 6
8/22/09 at 4:25pm
Have you tried pulling the battery first when you plug in the ac?
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post #4 of 6
8/25/09 at 9:49am
Thread Starter 
I have tried a working AC adapter, and pulling the battery. Both do the same. When the smaller USB/Power board is attached to the MB, the blue light on the smaller board goes out.

I will get a new USB/Power board and try.

Thanks.
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post #5 of 6
8/27/09 at 10:00am
Thread Starter 
Swapped out power/usb board. Same.
Swapped motherboards. Works perfect.

It was a fried motherboard, NOT the USB/Power board. Looked like a burned IC beside the main power plug on the motherboard. Instead of finding and soldering that IC, I got a replacement motherboard for about $75 and all is working now.


Thanks for the help!
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post #6 of 6
8/27/09 at 11:35am
Totally cool. Thanks for the feedback.

cheers ...
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