Lenovo G560 not booting. CPU Fan 100%. No output on screen or VGA

I have a Lenovo G560
When I power on, the fan is steady for the first 5 seconds, then it spins faster and stays like that. No output from the screen at all. 
External VGA does not present any output either. HDD doesn't spin and nor does the light turn on. Removed and reseated memory modules as well as HDD. No change. 
Purchased a replacement LCD screen as the current one was cracked the when laptop hit the floor! Therefore I'm thinking something's completely screwed the laptop up or is it a case of a loose connection.
Next thing I was going to try was to disconnect the CMOS battery which would hopefully reset the bios - Can anyone shed any light on this? I believe it's under the keyboard and I have the remove the top chassis. I know that it may be soldered on as well...Any advise or help is appreciated.
Thanks, Mitesh

hi mitster,
To access the CMOS battery, you need to remove the keyboard and the top cover. From there, just turn the motherboard over to remove the CMOS battery. (see page 54-57 of the hardware maintenance manual detailed instructions).
If reseating the CMOS battery doesn't give you a display, try to reseat the CPU. If still the same problem, the Intel HD graphics in the processor or the motherboard probably got damaged when the laptop fell into the floor. If you're near a local laptop repair facility, I recommend you take it there to test the motherboard / CPU.
Hope this helps.
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