Hi,
One of the component of the laptop seems to be failing. Try these steps that might help.
- First take the HDD of the laptop and see if it will go into a loop.
- If it's still the same re-seat the RAM, remove the RAM for a second off the laptop then put everything back together then turn it on.
- Last troubleshooting step you might want to try also is to re-seat the CMOS battery to clear the BIOS setting.
Note: If the laptop stays on without the HDD that could be the problem.