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AC adapter will not charge battery or power laptop

Posted on 2006-07-18
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Last Modified: 2012-06-21
Dell Inspiron 1150.
The DC voltage measured at adapter output is 19.5 VDC which is the correct voltage for the lap top.
Laptop will NOT power up with adapter only, and battery indicates 17% charge remains.
Light on front that should be on with adapter plugged in is NOT on.
Connector on back of laptop does not seem to be loose, so one would imagine connection to mobo is good.

Is an external charger available or what else might I do ?

Thank You, Mr442
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Question by:Mr442
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by:Mark
ID: 17132952
How old is the battery, they usually have a life span of 2-3years depending on the amount of charging cycles it has had.
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Expert Comment

by:Mark
ID: 17132960
You also mention that it doesn't power up with the adapter alone, does the laptop power up at all?
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Expert Comment

by:Mark
ID: 17132982
Dell has a recall on laptop adapters, does yours fit the description?
https://www.delladapterprogram.com/multiorder.aspx
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Expert Comment

by:Mark
ID: 17132998
One more thought , the adapter itself is not working, replace adapter.
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Author Comment

by:Mr442
ID: 17133072
It will only boot under battery power which is down to about 17% now. The adapter voltage is measuring the proper voltage but will not power the laptop by itself.
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Expert Comment

by:rid
ID: 17133797
Either there is a fault with the laptop charging/power circuitry that the power brick uses (for charging the battery and powering the laptop) or the power brick is bad. The voltage on the open connecor may be good, but it's difficult to know what it is once there is a load on it.

This could also be a physical problem with the laptop connector solder joints; it may be fit in place, but "one leg" could have developed a break in the joint to the mobo...
/RID
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Author Comment

by:Mr442
ID: 17139764
Thanks rid.
I plan to check it with a known good adapter.
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Author Comment

by:Mr442
ID: 17140141
Known good adapter also failed to power up laptop. It appears internal damage to laptop, possibly mobo is the culprit.
Will check out inside the case for any obvious damage or any possible inexpensive repairs inside that might solve the problem.
Parts are available for this model and I might just see something obvious and inexpensive to try.
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Assisted Solution

by:rid
rid earned 250 total points
ID: 17141106
Some laptops have a discrete power board for handling the power from the adapter. If so, it should be a bit cheaper than the entire mobo. Also, check the connector solder joints.
/RID
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Mark earned 250 total points
ID: 17141321
Ccording to this documentation from Dell it  looks to be integrated on the motherboard
http://support.dell.com/support/edocs/systems/ins1150/sm/system.htm#1084976

Here is the  service manual link. http://support.dell.com/support/edocs/systems/ins1150/sm/index.htm
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Author Comment

by:Mr442
ID: 17170211
Looks like a motherboard replacement is the only thing that will fix the problem.
Thank You for the help.
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by:Mark
ID: 17170636
Your Welcome.
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