Further Suggestions For A Fall-Damaged Logic Board; In-Depth Repair?

I have two 13" Macbook Pros, both with the same issue. They are both i5 (2.3 or 2.4 GHz models), 4 GB RAM, Mid-2011 models. Both of them have also been dropped. I believe they have problems with the logic board. When I try to turn it on, nothing happens. The battery does charge I believe, as the battery reports fully charged with the battery button and the MagSafe connector is green when plugged in. When attempting to power on battery alone, nothing happens at all (no lights, no movement, no noises). As soon as I plug the MagSafe adapter in (without pressing the power button), I get a very faint 'ticking' noise, which I have deduced to be the fan's motor VERY slightly receiving power (as if you put your hand on the center of the fan's 'blade' assembly, you can feel the motor very very slightly 'push'/pulse, but not enough to even move it; about 1 second between pulses. I have tried:

-Powering on with no adapter, but battery

-Powering on with magsafe adapter

-Powering on with no battery but magsafe adapter

-Resetting SMC

-'Bypassing' SMC with 'Hold power then connect Magsafe' method

-Jump starting it (with the two pads up near the 'rear' of the computer; if anyone could verify the location just so I can double-check I'm using the right ones, that'd be great, as a side note.)

-Reading the voltage from the pads used to jump start, 3.4-something volts DC (seems correct).

-Powering on with no RAM (had no different effect)

-Jump-starting with keyboard disconnected from board

Any other ideas where to go with testing from here? I just find it odd to find two that have the exact same (specific-seeming) symptom, from the same sort of damage, with no idea what's wrong. Could it be a fuse, possibly, blown by a short with the case from the fall (even if momentary)? If you have any suggestions for fuses to test or if this seems correct, please suggest them.

To be clear, I am entirely comfortable with removing any/every component in the laptop, if needed, and can work a multimeter and various other diagnostic tools (if I have them). I'm just not too familiar with this particular model's layout and could use some assistance from a more experience tech in regards to Apple products.

Thank you in advance for any replies.