PLEASE help with beeping black screen :(

 I have been fighting my m17x laptop for a couple of months. First the battery started not wanting to fully charge and shortly thereafter I was having issues with it not wanting to boot up and getting an incessant beeping with a black screen.  Sometimes, i could get it to boot up, but more and more it would not until eventually I could not get it to boot up at all.  Meanwhile the battery actually died so I bought another one and got on YouTube to see how to replace it because I didn't have a clue.  I replaced it and now it charges again, but still no boot up.  I researched this extensively and found that some have found removing the battery and the CMOS battery and holding the power button down for a full minute has solved this issue.  I opened the thing up again, but the CMOS does not appear accessible to me so I can't even try it.  I really need my computer back :(  

I am no techie or gamer.  I use my computer for business, but don't have a clue where to go from here.  Are you sure it must be the motherboard and not needing what I am told is a "bios reset"?  I know I found someone online that was able to get the beeping to go away and the computer to boot up.  I hate to assume the worst.   Where and how to I fix this thing and dare I ask what it will cost if it is the motherboard?  Please help I am LOST.