Will not start

SOURCE: dock station for hp pavilion

You need to check the plug that plugs into the laptop to determine that you don't have a faulty lead or plug. Test it with a multimeter and wriggle the plug to see if the voltage reading remains steady. If it doesn't then it could be the lead and this is easily repaired.
You may be able to borrow an adapter to test your laptop's connector.
If you determine the fault is with the laptop then problem is most likely the connector socket on the laptop, it most likely need re-soldering onto the motherboard, or needs to be replaced. This requires the laptop to be dismantled completely.

A docking station would solve your problem because the docking station has its own power connector and you plug the existing power adapter into the docking station.
My HP is connected to a docking station, the other advantage is that the docking station has several more ports than the laptop which is useful.

SOURCE: HP6715b hangs on start-up when docked

Try without connecting any devices.
Try to disconnect the dock.
Try to boot in safe mode.

Mandeep Singh

• 1184 Answers
• Posted on Oct 04, 2010

SOURCE: Hi, i have a hp

Hi,
Remove the battery from the portable and disconnect the Ac adapter. Press and Hold down the power button for 15 seconds.

Reconnect the Ac adapter only and power on the system. If the system is doing the same . The motherboard on the computer has gone bad.

You can read more on the same on the link below
HP support forum

Thanks for using Fixya
Proton

SOURCE: HP Elitebook 8540p is getting no video in docking station

The solution that resolved this problem On Bios version F.0E was:

• Power up the unit off the docking station and plug it into the docking station.
• Delete all copies of the COM1 port in the device manager.
• Perform a restart on the docking station.
• When you log back into windows go back into the device manager and redetect hardware.(You should now have 2 visable copies of the COM1 port. One will have a bang next to it.)
• Delete both copies of COM1 and scan for hardware changes. (This should give you 1 good copy of the COM1.)
• Power down the laptop, and take off the docking station.
• Power it back up straight from the docking station and you will notice no more hangs when booting off the docking station

Brian Sullivan

• 27725 Answers
• Posted on Oct 09, 2012

SOURCE: hp 2510p not charging

If your laptop works fine while plugged in but stops working while unplugged it's likely that either your laptop battery is bad or your laptop is not charging the battery properly.

Below are steps that can be taken to help identify the cause of this issue.

Leave power plugged in

Make sure the computer has been charging from the power plug for at least two hours before attempting to unplug it.

Remove and reconnect battery

In some situations the battery can become loose.
Removing it and then put it back into the laptop.

Third-party utility

Use a third-party battery utility to determine the total capacity of the battery.

For example, BatteryCare is a free software utility capable of doing this.

Replace battery or AC adapter

If your computer is still in warranty we suggest skipping to the next step.

If the above steps have been completed, we suggest replacing the battery in the computer or AC adapter.

In most situations it's a bad battery.

hope this helps

Try removing the battery from the back and then running it directly through the AC adapter. Sometimes the battery and AC adapter have conflicts and it can cause a laptop to become inoperable.

If this doesn't fix the problem in any way, I would recommend trying a new battery or AC adapter.

hope this helps