Have you checked power supply (controls) on control panel? Make sure it is set properly I think I had this problem where it was turning to automatic shutdown when idle for a certain amount of time.
Once I made the settings to stay on at all times the problem was gone.
Experiment with these settings make one change at a time.
I agree that it’s something in the power management settings. Under control panel, power options, somewhere you’ll find advanced settings. In there are settings for processor power management, minimum and maximum power state levels under battery power and a/c power. Maybe the levels are set too low. There are other hidden settings in there that could have something to do with it, too. Have you tried talking to HP?
I don’t turn my laptop off unless necessary; I usually hibernate it. Does your power button work unplugged if your laptop is just sleeping or hibernating?
My guess would be the hibernate/sleep settings are overlapping. The default settings in Vista, for example, are: start menu puts the computer to sleep, closing the lid causes hibernation. Therefore, if you do both unwittingly, the computer is unable to power on, as it is confused as to which power state it is recovering from. Plugging it in would force it to use different settings, and thus it would power normally.
But, from the other parts of your story, I doubt this is it, just a guess.
It has nothing to do with power management or sleep mode.
So starting out, the computer is off. If I press the power button, nothing happens, even if the battery is fully charged.
I must plug in the adapter, and THEN press the power button for the computer to turn on.
After the computer is on, I can unplug the adapter and it runs off the battery fine.
It seems like the computer needs the extra boost from the adapter to turn on.
There is no problem when the computer hibernates or comes back from sleep mode.
The new battery is compatible and is the same model. I never had this problem with the old battery but it cant be tested, becasue it no longer works.
Thanks
This is odd. When the computer is hibernating, it’s completely off, just as if you’d turned it off, it’s just saved the state of the computer to the hard drive.
Looking at all the evidence, it appears that your battery is the wrong model for your laptop, and doesn’t supply sufficient power needed to start the computer.
Double check the model number, and then make sure any packing tape was removed from the contacts.
Batteries and power supplies report all of this using digital signals. Either your replacement battery is the wrong model, or it’s just missing the proprietary chip. The laptop is rejecting it.