Black screenshots lock scroll

My HP Pavilion dv4-2145dx laptop powers on but has a black screen.  By caps lock and scroll lock key LED lights blink once.  HP says that this indicates bad CPU.  I replaced the CPU, but it has not fixed the problem.  Same lights always in the same schema.  What other problems this might indicate?

I've seen other posts on this problem and the new cpu will not fix. My guess is that it is actually the cpu socket - which means new motherboard needed.

Tags: Notebooks

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