Not sure if this is the place to make a thread about this specific problem, but here goes nothin.

I am fixing a friends Xbox 360. It is one of the first ones that came out, or the older ones. It had the three red rings of death, so im attempting to fix it. I tried the penny trick, took it all apart and replaced the thermal heatsinks with pennies. (two per chip, wrapped in black electrical tape.)

Although I used high temperature RTV silocone to keep the pennies wrapped in black electrical tape in place. I put it all back together no problem, screwes in the EXACT same place as the factory installed them.
BUT I ran into a problem.

For some reason, when I start it, the FAN overkills itself. But the Xbox startup logo appears for about a half of a second and it shuts itself off.
the fan sounds like it revs up REALLY fast and it just dies.
Btw, it is Nick96's 360

ANY HELP IS APPRECIATED!!!