Question about Dell Inspiron 5150 Notebook

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Laptop freeze when in ac charger

I replace the battery and ac power charger a couple of weeks ago , since then when i run the laptop (inspiron 5150) on battery everything is fine . When i put the charger on the mouse its freeze and the monitor flickering ? ? any ideas ?

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You really should have a cheap multimeter to help in this case.
There are three possible failures; the new battery pack has a shorted cell, the charger is defective or a regulator internal to the laptop is failing.
With meter, you can check two of the three areas; the battery pack and the charger. Depending on which kind of batteries are used in the pack, if it is charged, you can determine if it is completely functional by checking contacts on the case of the pack. The most common type of battery used is the nickle-metal hydride type (NiMH) which has a nominal voltage of ~1.2 volts.  If the pack is rated 6 volts, you could measure either 4.8, 6 or 7.2 volts with the last one the most likely. If it measures 4.8 or 6 volts, it probably has one or two cells shorted, making it useless.
The charger could measure all over the map; many of them are unregulated and if they are rated at (for example) 9 volts, they could easily put out 14-20 volts when they do not have a load on them.
If those two items seem to check out OK, then the regulator in the system has gone bad. This might be on a separate board inside but to check it out, you really need some technical experience, otherwise you don't really know what you are seeing or looking for.      

Posted on Dec 01, 2008

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