Having problems with your HP Compaq nx9600 Notebook ?

Arc occurs when plugging in the power supply

\015 My compaq presario laptop will not power on or charge the battery, when I plug it in an arc occurs at the connection. is the the DC connector shorting out? if so, where do I get one to replace it?\015

Answers :

Does the green light come on when it is plugged in? Take a look at this post on the HP forums http://forums11.itrc.hp.com/service/forums/questionanswer.do?admit=109447626+1247634351946+28353475&threadId=66918 . In case the link doesn't work, I am including it at the end of my response. From the looks of it, if it is still under warranty you need to go and have Compaq do something about it. This appears slightly common amongst those notebooks (common enough to quickly find more cases of the same problem in a google search). If you are under warranty, this guy describes a delicate fix for it.\015\012
\015\012[from HP forums]\015\012"I recently acquired a second hand Presario 1200 (model 12XL300) from a frustrated owner who could no longer get it to turn on, just had the green light when the power pack was plugged in. After completely disassembling the computer and removing and inspecting the mother board, It was evident the problem was the power jack attachment to the board.
In a previous thread, a poster had described this point as a cold solder joint and had temporarily fixed it by re soldering. The problem is that it's more like a no solder joint. The circuit board area that should receive solder to mate to the rear lug on the jack is covered with the green protective coating to prevent solder adhering. The only exposure is the edge of the hole which only allows a few thousandths of an inch exposure to solder.

The jack is then straining against this minute connection every time the power supply is plugged in. As the joint fails, less and less power is able to be transmitted through it until none can be.

The fix I made was to use a dental pick the chip off the coating to the bare copper around the lug. This is pretty delicate work and the copper can be easily damaged. Then I re soldered, again delicate work since direct heat to the board can delaminate it. Next I put a drop of super glue between the jack body and the board to try to eliminate any flexing when the power is plugged in.

The computer works flawlessly now. In my opinion, this is decidedly a manufacturing defect that should have been caught by inspection of the boards prior to assembly, or certainly after the solder process as very little solder was adhering to the joint. These boards are manufactured in large batches, and there must be many that have failed in warranty or are in the process of failing. Again, in my opinion, it's inconceivable that HP/Compaq is unaware of this defect." -D Stansbery
It is likely that the dc connector is bad. I would find a new one on ebay and then locate a good technician that can solder to put it in. Motherboard will have to be taken out of the computer to do this so make sure you use a good "LAPTOP" technician as this can be a bit difficult
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