Why diddint the ylod kit work for me?

I have a 40gb playstation 3 that is about 5yrs old. It recently went out, caught the ylod. It was probably my fault I just got 2k13 and to build up my player I would run the game a lot on coach mode. Coach mode is pretty much like putting your game on auto pilot, you get all the credit for doing nothing. So I did that for like 3 months straight almost all day every day, which started making my playstation make a humming sound, like the fan was running hard or something. Then all of a sudden it would randomly turn off after about an hour of play and beep and blink a red light not a yellow. It did that for about a week or so then one day it jus didn't turn on at all. It would beep a couple of times when I pushed the power button and immediately show the yellow light and turn it self off blinking the red ligt. So I went online and did some investigating, checking out videos on you tube and trying out stuff like the hair dryer heating and cooling method and nothing would work. Then I came across the ifixit ylod video with some hot nerdy tech check takeing a ps3 completely apart and useing a kit to re flow the mother board. So I looked up the web site, ordered the kit and immediately went to work on my playstation when it came in. Following the guide on the web site and watching your video a dozen more times I felt ready and confidant to go ahead with the process. When I opened up my playstation I realized that mine didn't look like the one in the guide or video. I still went on and eventually I got down to the mother board. I cleaned it up and took off all the old paste and pads, then heated it up getting the mother board warmed up and the chips even warmer. I let it cool and applied the new paste and pads, put it all back together and almost cried when I saw the yellow light flash and turn red beeping at me like it was laughing at me. I really thought that I did everything right and I was expecting for it to stay on with a green light jus how that girls playstation did in the video. I feel like I wasted 50 bucks for nothing. I'm a full time student who barley has money for lunch at times. I can't afford to buy a new playstation and I don't want to give up on mine, please help)-;