Onkyo TX-NR Receiver DTS chip Reflow Procedure

This unit has more than one issue. The sound matrix from the amp is not working due to the DTS chip desoldering from the board. It causes cold solder joints and in some cases will come on if the chip is heated. The chip expands with heat so cooling it can also make them come on when they shrink. This one also has a low voltage power supply issue. 12v and 5v section issues. Being too high! I will go back to the drawing board to get that issue fixed, then the DTS chip should be okay. I can get the chip and can replace it, but I also don't want to do that until I'm absolutely sure that is the issue. The chip is bad from either taking a hit from heat or from me working on it. The main issues at this point are the low voltage supply problems.