Its a late 2011 15″ Macbook Pro, one of the last before they stopped putting optical drives. It seems to be an issue with the logic board of power management, Ive tried resetting PRAM, NVRAM, SMC, disconnected the battery and made sure all the other connections were in place. Over time its had lots of trouble connecting to a 1080p TV over a HDMI/Mini DisplayPort cable into the Thunderbolt port, every other computer and cable is fine. Random slowdowns, the automatic backlight dimming was totally random, sometimes the red light in the optical audio port came on. Not it sits like a total brick, not powering on. Resetting SMC with the power in changes the colour of the charger light for a moment, but thats it. Once I got it to start up running fans at full speed, but no light or image on the display. Display was always forced onto the dedicated 6770M GPU in the few months I had it, as I blamed issues on the integrated Intel stuff, but in hindsight it didnt fix the problem and it seems to be an issue with the Thunderbolt port, also the USB ports often failed to recognise familiar iPhones and would often cut out power. Going to call up Apple tomorrow. In the mean time, leaving it off and will try again later to see if anything magic has happened. I did like having a new laptop, now Im getting by quite well with the old 2006 family iMac. As long as the LCD is free of vertical lines after 6+ years, and it otherwise seems to work fine for half an hour or so over decent load, its a pretty safe iMac to buy. All give Macbook Pros, 15 inch ones, have had about 9 motherboards fail between them, and the total repair time added up to probably six months.