Satellite U400 will not usually boot up

Hi all,
I have a Toshiba Satellite U400-217 (PSU44E) running Windows 8.
Worked fine until a week ago. Now, when I switch it on, the indicator lights light up, there is a brief hard drive spin (1 second) - and then nothing. The lights above the keyboard stay lit, but the screen stays black.
I read a reset remedy where you take the battery and power cable out and hold the power button for 30 seconds, then plug the power cable back in, boot up, shut down, reinsert battery and boot up again.
However, the machine will still not boot up after the 30-second button hold. I still just get the lights and nothing else.
However, the machine will generally boot up fine on one attempt out of every 30 or so.
It's annoying - any ideas or suggestions very gratefully received.
Many thanks,
KaiBosh

> However, the machine will generally boot up fine on one attempt out of every 30 or so.
In my opinion you should firstly check the HDD
A friend of mine installed Win 8 on new notebook from another manufacturer
After some time the notebook could not boot up I thought its something wrong with motherboard but finally it was just an HDD malfunction
To be honest I dont know if its only HDD issue but in my opinion the HDD is one of the first parts which should be checked
Ok, in worst case it could be possible that mobo malfunctions.

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