Dead Logic Board?

[StockDC2]

Hi, I have 2 Macbooks (pre-unibody), both of which the same problematic symptoms. When either is turned on, the computer chimes and the screen flicks to a dark black. The fan begins to spin but there are no signs of hard drive activity.

I've tried swapping out the memory and trying individual slots all to no availability. I know that this is not likely but could a dead PRAM battery cause this to happen? I've been reading about mixed thoughts on this and am hoping for a definite answer. Thanks in advance!

 

[Reflow]

Have you tried to reset the SMC or the PRAM

 

[StockDC2]

Yes, I've done both on both machines. Still no luck 🙁.

When doing the PRAM reset, I also made sure to hold the buttons until the 3rd chime was made. Even then, all I ended up with is a black screen.

 

[AshMan]

Anything show on screen at all? Tried external monitor? Checked to see if it is an LCD issue?

 

[StockDC2]

Unfortunately, there is nothing on the screen. I've tried swapping the LCDs to no availability. I'm quite certain that both LCDs work.

I have not tried using an external monitor because I do not have the DVI connector 🙁. Even if I did, I'm sure that it wouldn't work since nothing is being displayed on the LCDs.