|It sounds like either the cpu is overheating, or there is a problem related to the battery or AC adapter. |
If the CPU is overheating the computer will shut off and not start up again until the CPU has cooled below some threshold temperature. You can check the present CPU temp in the bios, or you can load programs in Windows that can show you that anytime you care to look, e.g.the freeware SpeedFan, or some brand name computers already have such installed in their original brand name software installation
The most common causes of that is....
- you are obstructing the openings that let air into and out of the base
- there is too much accumulated dust, lint, etc. inside the air passages inside the base
- if the laptop has been used a lot, the fan inside the case may be spinning too slow, or not at all.
The latter two may require you get yourself a Maintenance manual and open up the case to take a look. In most cases, the HP site has such for HP and Compaq computersin the manuals available for your model .
If there is a problem related to the battery or AC adapter, your main battery may not be being charged properly. In that situation, when the main battery hasn't got enough capacity, most more recent laptop computers will shut off and will not not start up again until the main battery has at least a minimal charge - the computer will not start up on the AC adapter alone, or if the AC adapter is connected but main battery can no longer retain at least a minimal charge.
If the main battery gets HOT rather than just warm when you attempt to charge it with the laptop off after a half hour or more of charging, the main battery is internally shorted and you MUST replace it.
Laptop no video (or video problems), and battery, AC adapter, power jack T shooting.
See response 1:
DO NOT plug in or unplug a monitor's video cable into / from a video port while the computer is running. Doing so can damage the monitor's circuits and/or the video adapter's circuits.
Some laptops will display on an external monitor without you having to do anything.
If you get no video on an external monitor, some laptops have a key combo that you must press to toggle the display to external video only / sometimes both / built in display video only - see the Owner's or User's manual for the model.