MDD Dual does'nt boot anymore

[BIGgui_X_]

Hi there !!
I opened my MDD dual 1.25, and removed the heat sink to place a fan at the back of the heat sink, to force the heat out of the case. I placed the heat sink back, booted a couple of times, everything was fine, but the fan was making noise. I removed every screw of the heat sink, except one, pushed the heatsink on the side, add another screw to the fan, so it'll be more stable. I replaced the heatsink, tryed to booot, and then, nothing happened... The computer starts, no chime sound, and then, about 10 seconds later, the CPU FAN starts to spin at full speed.... Anyone have an idea of what appened ? Can i do something about that ? Is removing the heatsink voiding the warranty ??

thanks !

 

[blue&whiteman]

no, only changing the jumper settings can void your applecare. you sure the heatsink is back on right? heat sinks are so important that many cpu cannot run for more than 10-20 sec. without one.

 

[BIGgui_X_]

the heatsink cannot fit if not alligned in with the screw holes... it is right in place... can a CPu detect that there is not enough heatsink compond ? can i remove the CPU daughter card and put it back in place ?? i cant figure out how to do it !! the machine doesn't even boot, i dont ear the HDD loading anything.. strange...

 

[MacRAND]

Messing with the sink...

Originally posted by BIGgui_X_
I opened my MDD dual 1.25, and removed the heat sink to place a fan at the back of the heat sink, to force the heat out of the case.
I placed the heat sink back, booted a couple of times, everything was fine, but the fan was making noise.
I removed every screw of the heat sink, except one, pushed the heatsink on the side, add another screw to the fan, so it'll be more stable.
I replaced the heatsink, tryed to booot, and then, nothing happened... The computer starts, no chime sound, and then, about 10 seconds later, the CPU FAN starts to spin at full speed....

It's not like you do not know where to look, which is the best news.

blue&whiteman is correct, make triple sure that the heat sink is well seated; you already know to be careful and I assume, well grounded. Well seated does not mean over-tightening screws.

After being self reliant, check around (local MUG people) for a good Apple authorized shop, tell them exactly what you did so they don't have to guess, and pay a professional to bail you out. How much is your time worth, including down time? (not looking for you to tell me) If you were planning to install another hard drive internally, maybe this is a good time.

I've had half a dozen Macs since 1990, upgraded CPU, added RAM, hard drives, etc. - light work - and always been able to get out of a mess by retracing my steps, putting it in original state, read directions, doing the install again, and most importantly knowing when to cry HELP.

I had no clue on how to align the scanner bulb after messing it up while JUST CLEANING the inside glass surface, ugh. Thank the goddess it only cost me $20 to get it "cleaned" which included an alignment. Afterwards, it worked great. From then on, I don't clean anything inside a scanner.

It's probably something simple. Keep working at it. I really think you will get it worked out.