Alright...
- I noticed the issue with my G5 became much more frequent after removing and reinstalling the memory. In addition, doing so would sometimes temporarily cure the problem. The memory slots are a high flex point and the large IBM IC on the back of the board is quite close to the memory slots. Therefore, some flexing can create and even temporarily resolve such problems, so don't be surprised.
- Using a space heater aimed directly at the memory slots will sometimes allow the machine to function correctly. This is through heat expansion of the solder joints allowing the chip to connect with the logic board, which allows for a successful boot. It won't cure the problem, but it does aid in troubleshooting.
- Be VERY careful when using a heat gun. As I mentioned in my above post, the last time I used a heat gun, the concentrated heat was enough to warp the board. If you're going to go this route, heat only the suspect chip, don't go crazy anywhere else, and keep the amount of time required for heating to a minimum.
- Be aware that you will need to strip the board of any tapes and plastics such as heatsink pins and what not. You essentially need to strip the board as far as you can go in the area you're about to heat without actually pulling components off the board (memory slots and all will be able to withstand it).
- I noticed the issue with my G5 became much more frequent after removing and reinstalling the memory. In addition, doing so would sometimes temporarily cure the problem. The memory slots are a high flex point and the large IBM IC on the back of the board is quite close to the memory slots. Therefore, some flexing can create and even temporarily resolve such problems, so don't be surprised.
- Using a space heater aimed directly at the memory slots will sometimes allow the machine to function correctly. This is through heat expansion of the solder joints allowing the chip to connect with the logic board, which allows for a successful boot. It won't cure the problem, but it does aid in troubleshooting.
- Be VERY careful when using a heat gun. As I mentioned in my above post, the last time I used a heat gun, the concentrated heat was enough to warp the board. If you're going to go this route, heat only the suspect chip, don't go crazy anywhere else, and keep the amount of time required for heating to a minimum.
- Be aware that you will need to strip the board of any tapes and plastics such as heatsink pins and what not. You essentially need to strip the board as far as you can go in the area you're about to heat without actually pulling components off the board (memory slots and all will be able to withstand it).