Greetings to everyone.
I recently took an HP zv5000 laptop from a friend to help repair an issue they are having.
A couple months or so ago, the aging 14.8 volt 6.0Ahr HP battery was replaced with a new 14.8v 6.6Ahr unit. About a month afterwards, the unit began shutting down right after turning it on.
On A/C power only w/ no battery, the unit does not power on but instead a faint clicking noise accompanied by a very faint high pitch is heard from the area of the a/c jack/cooling fans. The LEDs blink dimly with this noise.
On battery power only w/ no a/c, the unit turns on long enough to engage both cooling fans, blink the LEDs, then shut down. The faint clicking is not heard.
On battery + a/c power, the unit usually turns on long enough to display the HP logo, activate the usual LEDs, engage fans, and then shut down. Again, the unusual clicking sound is not heard.
From my recent research into the problem I have checked the A/C jack for melted solder points, tried with both the old and new battery (I think both are now discharged - I have no options regarding this), removed the hard drive & tried with no difference, and looked for debris buildup near heatsinks, cooling ducts, and fans. I've also verified the PSU by plugging it into a compaq laptop with similar voltage input specs, it worked.
While the information I have gathered in the last few days seems to indicate the issue is on the mainboard itself at this point, I would still like to determine the problem as much as possible. I am capable of replacing the motherboard, but I want to prevent the same issue from reoccuring.
Is it true that a larger capacity battery places greater load on the power supply? If so, is it possible that this greater load while charging in conjunction with using the laptop might have strained any voltage regulators found in the power circuits of the mainboard?
I greatly appreciate any insight you can provide me with on this issue;
Kevin
I recently took an HP zv5000 laptop from a friend to help repair an issue they are having.
A couple months or so ago, the aging 14.8 volt 6.0Ahr HP battery was replaced with a new 14.8v 6.6Ahr unit. About a month afterwards, the unit began shutting down right after turning it on.
On A/C power only w/ no battery, the unit does not power on but instead a faint clicking noise accompanied by a very faint high pitch is heard from the area of the a/c jack/cooling fans. The LEDs blink dimly with this noise.
On battery power only w/ no a/c, the unit turns on long enough to engage both cooling fans, blink the LEDs, then shut down. The faint clicking is not heard.
On battery + a/c power, the unit usually turns on long enough to display the HP logo, activate the usual LEDs, engage fans, and then shut down. Again, the unusual clicking sound is not heard.
From my recent research into the problem I have checked the A/C jack for melted solder points, tried with both the old and new battery (I think both are now discharged - I have no options regarding this), removed the hard drive & tried with no difference, and looked for debris buildup near heatsinks, cooling ducts, and fans. I've also verified the PSU by plugging it into a compaq laptop with similar voltage input specs, it worked.
While the information I have gathered in the last few days seems to indicate the issue is on the mainboard itself at this point, I would still like to determine the problem as much as possible. I am capable of replacing the motherboard, but I want to prevent the same issue from reoccuring.
Is it true that a larger capacity battery places greater load on the power supply? If so, is it possible that this greater load while charging in conjunction with using the laptop might have strained any voltage regulators found in the power circuits of the mainboard?
I greatly appreciate any insight you can provide me with on this issue;
Kevin