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Hi, check the on / off switch, it is most likely sticky. To test it open your case and trace the wires from the switch to the motherboard. unplug the power switch wire and bridge the 2 pins together, this will start the computer. then power down and if it shuts down properly then clean or replace the switch.
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From what you are descrbing it sounds like a PSU issue
Please try the following
1) Remove all the wires from the PC
2) Press and hold the power button in for about 10 seconds (yes i know there is no power :) )
3) Plug everything back in and retry, if it still fails the Power supply will need to be changed
The Power supply can be swapped out at any decent PC repair shop and is quite cheap to do
Activate low power usage in Bios and also check that the power setting iis adjusted so that PC doesnt "shut down when power is low" this can be found by rightclicking on the desktop,choosing properties then power ...
This sounds like either your motherboard or power supply is shot, if it is still under warranty you can get HP to send you a new power supply or send your PC back to them and they should fix it for you. You can check your warranty status online on HP's website here. Hope this helps.
You mom will not kill you, the fault was probably not caused by you (you can tell her I told you).. The fault most likely a faulty video chip on the laptop or a faulty connector between the laptop motherboard and the LCD screen. You can connect the laptop to an external monitor and the power the laptop up, if the image on the monitor is OK then the video chip is OK. If the laptop is new then it should be under warranty, get it fixed or replaced.
I don't know Samsung's warranty policy for Australia so I'd email them right away. It could be an input voltage problem. It could be heating up components in your equipment causing it to shut down and reset when it cools off. As the green light is not even coming on may be an indiction of this. So I'm guessing you are currently shortening the life of your equipment. Rich
it looks like theres an easy solution to ur prob though I havnt got full details.
what pc world did is common.but you either know this or dont and u will never know until ur told.
I went into pcworld once and asked for some dos disks,they looked at me like ive two heads and informed me that dos doesnt exist,I didnt know whether to laugh or punch their lights out as Im a computor technition and use dos platforms quite often.in xp repair at startup this is a dos platform.almost every outside of windows to repair pc's is a dos.
Anyway if ur looking for a manual that explains everything about ur pc and has a very informative trouble shooter;get back to me with ur model details and I'll mail u one.