[help]Laptop won't shutdown and get turn it on again like restart

excuse me, I have a problem with my laptop,
I have a laptop HP DV2000 AMD Based,,,

1. the problem is when I shutdown the laptop , in a few seconds will turn on again, like restart..

2. I tried to standby it, but the same result, also hibernate, then it will turn on agian...

3. I remove the battery, i just use adapter then i shutdown, it's also turn on again,

4. I just used battery without the charger, then i shutdown.. it come turn on ..

5. I unplug the HDD because i though OS problem but still come alive too ....

6. I check "wake on" in bios but nothing, I check in the OS but already turned off ....

7. i try hard shutdown, it's work but only for few second turn on again, trus...

8. I already update the bios but still like that

my laptop just fine few times ago, but few times later, i got this problem, i try to fix at laptop repair, when i got there, i turn this laptop on, and try to shutdown to show this problem, but it's getting normal, nothing happened, so i bring it back home, for few days it's normal,,,

when i give it back to my aunt, when i arrived , i turn on and shutdown, but this happened again?

please help me about this problem... pleasee,,,

sorry about my english...

 

This is most likely a hardware problem. I would return it if you can or send it in on warranty.