I have the exact same error.
My S6 is from late 2006 (2007 model) but modules were for sure produced before that and as low-temperature solder was mostly banned around 2006 I assumed they might have used that older solder.
The “newer” type solder will start to melt at about 450 to 475 degrees Fahrenheit (about 232 to 246 degrees Celsius).
I thought it would be safer to start way lower and work my way up the scale
The method is to bake the circuit board for about 8 minutes without preheating the oven. Check periodically and if you see the solder get bright and shiny, go ahead and shut it down.
After 8 minutes or when the solder gets shiny, shut off the oven, open the door, and let everything sit for about 30 minutes.
This time it worked for several days.
Next time I will try with 240 degrees Celsius.