MacBook Pro 17" (Late 2007) not starting up after battery calibration (depleted)

Hi, I have spent most of today skimming through the advice given on these forums, but to no avail. I cannot power up my MBP. Since it is Sunday, I will give my best to find every piece of "soft" advice to try before giving up my daily workhorse to the official Apple Support.
Machine specs:
MacBook Pro 17" Hi-Res pre-unibody (2007)
Second battery - original bloated about a year ago (lasted 4 yrs! of continuous use)
SSD primary, HDD secondary drives
6GB om RAM
2.4GHz C2D
MacOS 10.6.8
Logic board replaced a few years back with faulty graphics (re-call).
This is what happened:
I decided to recalibrate my MBP (replaced, non-original NuPower) battery over the weekend.
I'm using my laptop at home and at the office, plugged in mostly. So it was advised to perform this procedure for the sake of a healthy battery.
Dreained it to the state of sleep nd then waited for the sleep light to go off.
A couple of hours passed after that when I returned to my desk and plugged in the adapter.
The LED went on GREEN (weird, I thought, but hoped it just did not pick up the completely drained battery right away).
Let it rest with that state for several hours. LED remained GREEN at all times.
Tha laptop sat still on the desk the whole time...
This is what I tried:
Unplugged, took battery out briefly, replugged - GREEN indicator.
Tried another adapter (60W instead of the original 85W), that adapter showed green as well.
Tried my AC adapter to charge another MacBook - charged fine, AMBER light.
- THIS MEANS the problem is with my MBP unit (incl battery).
Unplugged, took battery out, held the power button for 5secs (SMC reset), reassembled - no improvement
Tried all key-combos, held power button for 10secs
Took the battery out and tried to bott with plugged adapter, this normally works fine, but now nothing - no sound whatsoever
- THIS MEANS the issues is not with the battery, it is with the power management.
Sad thing is, that if it is the motherboard somehow that got damaged by itself, it means the end of this fine and capable machine. It is not worth the investment of a replacement motherboard and buying them from ebay is not a sustainable option
Tomorrow I will swap AC-adapters and batteries with an identical model of a friend. I will let you know.
I expect little you can help me with, but for future reference, the story might prove useful for similar cases. I was upset and surprised mainly because of the timing - not powering up after drained battery during calibration process.

Dreained it to the state of sleep nd then waited for the sleep light to go off.
A couple of hours passed after that when I returned to my desk and plugged in the adapter.
Did you wait 5+ hours? Per article - http://support.apple.com/kb/PH7261 "After your computer goes to sleep, turn it off or allow it to sleep for five hours or longer."
Calibrating your computer's battery for best performance

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MacBook Pro 17" (Late 2007) not starting up after battery calibration (depleted)

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