Need a new motherboard for Accumove after just 3 years $850

I am very disappointed that I am told my Accumove2 Motherboard is corrupted and needs to be replaced. My machine is just 3 years old. This should be covered by the warranty and it is not. This is wrong.

 

Our machines are covered by a 2-year warranty (3-year on Plasma Power supply). Once the mobo is replaced, it will be covered for 1-yr.

 

how did you know that its the motherboard? mine is giving me problem too and tech support aren't calling me back! my 4400 is two years old

 

how did you know that its the motherboard? mine is giving me problem too and tech support aren't calling me back! my 4400 is two years old. how much was it?