iMac 27" late 2011 SSD (LCD) screen wont turn on

[Q8IMAC]

Hello,

I installed a OWC SSD for my iMac and after following the youtube video installation I put the iMac back together and the screen wont start. After a couple of seconds the fan kick in, I checked the logic board and only 3 of the 4 leds appear.

Any pointers ?

Thank you in advance,

Mo

 

[madeirabhoy]

might not help but just from problems with mine today (see thread in imacs) the way the technician worked out it was my screen and not my graphics card was to plug another monitor in. if you plug an external monitor in and it comes on, then its your imac screen, either damaged or not plugged in.