MacBook Pro - No Display, Keyboard or Trackpad and fans blowing high

[flightdelayedagain]

A friend asked me to look at his MacBook Pro, its a Core i5 - 2.5 13" Mid-2012. 4G Ram. When booting, it chimes but nothing on the display so I connected an external monitor, USB keyboard and mouse.

I tried SMC and Pram reset. I booted from USB drive to run TechTool Pro on the main HD and it ran for 5 minutes and shut down. Could it be the Logic Board?

TIA

[Acer]

About the only thing left is to crack it open and disconnect the battery cable for awhile, but I would not get my hopes up.

[C(-)ris]

Acer wrote:
About the only thing left is to crack it open and disconnect the battery cable for awhile, but I would not get my hopes up.

And swap the ram and HD with known good.

[anonymouse1]

Blow it out? Dust bunnies? It's a long shot...