water(coffee) damage on logic board (820-2850 A)

I try to repair a A1286 MBP, mid 2010 15" (820-2850 A Motherboard).

My Electronics-knowledge is ok, but i could need some Macbook- expert-advice.

The Notebook has water damage, and before maybe ordering spare parts, i want to find out as much as i can about the damage.

Initially it was plain dead, even after thorough isoprop.Alcohol cleaning.

Findings:

After a year laying around, now it's a bit better:

• pwr button not working, i turn it on via pads on Motherboard, not booting. (have replaced a mbp keyboard before, easy, but lots of screws...)
• Battery is charging.
• Screen black. (LVDS Connector has the leftmost 2 pins corroded, sure needs replacement.)
• via hdmi cable, no ext. screen. (turn on, close display)
• Without ram, i get 1 blink every 5 sec (no beeps), seems normal no-ram error, according to blink definitions.
• With ext. keyboard, i can eject a cd upon boot by pressing F12.

Powering on with all connectors (excl. keyboard):

• pwr led on, fans spin up
• hdd spinup
• some hdd access sound
• dvd init sound
• pwr led off
• some hdd access sound

Resources found so far:

Service Manual: http://tim.id.au/laptops/apple/macbo...1... (site has many more)

Schematics: http://forums.macrumors.com/showthre...l...

Power on Self-Test Beep/Blink definitions: http://support.apple.com/kb/ht1547

Questions:

• Is there a way to power off / Reset by shorting some Pins on the Board? [edit] Ah, off course: shorting the contacts which turn on the mac, for longer than ca. 10sec. will turn it off (hard reset).[/edit]

• Would i normally get something on an external screen before booting? (if yes, also via hdmi, or maybe only vga?)
• To better work with the schematics, are there any board layout infos around? (fuses, lvds pin ordering, test point locations...)
• any of my symptoms sound familiar?
• general tips on how to proceed?

Thanks to the manual- and schematics- posters... and hopefully some responders ;-)