Hi,

A friend of mine has a Compaq Presario1200 which apparently has stopped
charging the battery. The mains power LED and battery charging LED lights
up when connecting the mains. However when I pull the mains plug the
computer shuts down immediately as if there was no battery at all. Same
behaviour with a brand new battery.

Any hints or tips highly welcome

regards

Chris

Check the charger circuit with a DVM to see if it is putting out voltage to
the battery. If so, the battery must be replaced.

Most of the time, the failure in this case, is a defective battery.

--

JANA
_____


"Chris Webster" wrote in message
...
Hi,

A friend of mine has a Compaq Presario1200 which apparently has stopped
charging the battery. The mains power LED and battery charging LED lights
up when connecting the mains. However when I pull the mains plug the
computer shuts down immediately as if there was no battery at all. Same
behaviour with a brand new battery.

Any hints or tips highly welcome

regards

Chris

"JANA" skrev i melding
...
Check the charger circuit with a DVM to see if it is putting out voltage
to
the battery. If so, the battery must be replaced.

Most of the time, the failure in this case, is a defective battery.

As I said, we have tried with a brand new battery too, same result. I
mainly wanted to know if there is some kind of fuse or something in the
Compaq notebooks power supply management which may break in certain
situations. With all components being SMD it not much one can do without
proper equipment if there is a component failure.

Any clue how much a new powersupply (which I assume includes the charging
circuits, may cost?

Chris


--

JANA
_____


"Chris Webster" wrote in message
...
Hi,

A friend of mine has a Compaq Presario1200 which apparently has stopped
charging the battery. The mains power LED and battery charging LED lights
up when connecting the mains. However when I pull the mains plug the
computer shuts down immediately as if there was no battery at all. Same
behaviour with a brand new battery.

Any hints or tips highly welcome

regards

Chris

Chris Webster wrote:

: Any clue how much a new powersupply (which I assume includes the charging
: circuits, may cost?

: Chris

Google is your friend.

I google searched "multi voltage pc laptop power supply" and got many hits.
One was: http://www.laptopacadapter.com/compaq/

b.

"Chris Webster" wrote in message
...
"JANA" skrev i melding
...
Check the charger circuit with a DVM to see if it is putting out voltage
to
the battery. If so, the battery must be replaced.

Most of the time, the failure in this case, is a defective battery.

As I said, we have tried with a brand new battery too, same result. I
mainly wanted to know if there is some kind of fuse or something in the
Compaq notebooks power supply management which may break in certain
situations. With all components being SMD it not much one can do without
proper equipment if there is a component failure.

Any clue how much a new powersupply (which I assume includes the charging
circuits, may cost?


Assuming this is a reasonably recent laptop, ie newer than about ten years
old, the power supply is almost certainly just that and nothing more- a
power supply.

The management of battery charging is taken care of by the laptop circuitry,
not the PSU. If the power supply is powering the laptop normally, the power
supply is most likely OK.

There are usually surface mount fuses inside laptops, and it's possible one
has blown. However, more likely the charging circuit has failed because of a
bad battery with shorted cells. Repair may well be uneconomical or
impractical.

Dave

I beleive he ment the internal power supply..


wrote in message
oups.com...
Chris Webster wrote:

: Any clue how much a new powersupply (which I assume includes the
charging
: circuits, may cost?

: Chris

Google is your friend.

I google searched "multi voltage pc laptop power supply" and got many
hits.
One was: http://www.laptopacadapter.com/compaq/

b.

My Compaq 1610 always had battery problems of one sort or another. One
more thing to consider is that Compaq may have a power management
driver upgrade/fix available for your model. Check under support on the
Compaq site. They had a software fix that actually worked in my
computer. Also some Compaq models have the power management circuit
available as a replaceable part.