Alright yesterday I tried installing a slk-900u onto my 8rda+, which required me to take it out of the case and install the backplate, when I installed it and plugged everything in, I didn't get any monitor output and I got a postcode of 29. I tried switching out the video card, and the ram. What do you guys think the problem is? Before I installed the heatsink there was no problem with the system.