Dv8315nr drops to battery while plugged in, especially under load

Have the dv8315nr and it keeps dropping to battery while plugged in, especially when the PC is under load, such as games or using CD drive. The power block is ok, it has been tested with other power blocks and the issue still happens. If you unplug the power at the pc and plug it back in, it will (most of the time) go back into a charging state. I sent to hp while under the extended warranty and they sent it back with the diagnosis of "battery was bad, needed new battery".....and it worked ok until just out of warranty then started again.
I don't think it's the battery, since it happens with or without the battery in place (of course it dies completely when the power drops w/o battery in).
Has anyone experienced this and if so, have a method to fix it? I suspect there is a hardware problem with the power supply in the laptop.
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It sounds like the beginning stages of a bad power jack. That is the place where you insert the AC adapter into the laptop. The problem is very common and requires that a new jack be installed. Fortunately for you, the dv8000 has the power jack as a separate plug-in module...it does not require soldering just removal and replacement.
Here is an internet ad for a company that does the repair. I am not suggesting you hire them but they do post some nice pictures of the internal workings of the dv8000 series so you can understand what I am writing about. The repair job is only modestly hard; not nearly as bad as if soldering were needed. The part is readily available.
Repair ad with pictures

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Battery Information:
Model Information:
Manufacturer: SMP
Device name: ASMB014
Pack Lot Code: 0002
PCB Lot Code: 0000
Firmware Version: 0110
Hardware Revision: 0500
Cell Revision: 0102
Charge Information:
Charge remaining (mAh): 1821
Fully charged: No
Charging: Yes
Full charge capacity (mAh): 6016
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Condition: Normal
Battery Installed: Yes
Amperage (mA): 1554
Voltage (mV): 11104
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 15
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 8
Automatic Restart On Power Loss: Yes
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: No
Current Power Source: Yes
Display Sleep Uses Dim: Yes
Battery Power:
System Sleep Timer (Minutes): 5
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 1
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: Yes
Hardware Configuration:
UPS Installed: No
AC Charger Information:
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ID: 0x0100
Wattage (W): 60
Revision: 0x0000
Family: 0x00ba
Serial Number: 0x00240f33
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Dv8315nr drops to battery while plugged in, especially under load

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