Laptop with black screen

My laptop is a Compaq Presario CQ56-112SA. I tried to install Ubuntu to dual boot with Windows 7 OS existing. When I got to the pages I did disk partitioning, I got out of my depth. I therefore cancelled the procedure, but almost immediately, the screen went black. Now, I find that the screen is black, everytime I turn on. The LED on the wireless key lights up orange and the caps lock LED flashes every 3-4 seconds. I have tried hard resets (removal of battery etc and holding down on/off switch) with no luck. I'd like to get to CMOS battery to try to remove that briefly, but I think that it is difficult to get to. Please can anyone suggest what else I could try to get the laptop to boot.

Nothing to really as it turns. I had been led to believe it was a time of failure the first software that it happened I would have suspected the same problem and went straight back to the first repairman. Thank you for your interest in any case. No doubt I'll be back with more questions in the future, but not too often I hope.

Tags: Notebooks

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    ------------------------------------------------

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    ---------------------------------------------------------------------------

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