820-00239 5V Issue

[Thomas]

How do I remove the underfill on UB300?

**UB300 is getting hot and I am sure it needs to be replaced in order for this board to shoot back to 20V. Any advice on the underfill would be much appreciated.

 

[2informaticos]

No easy way to remove it.
I recommend to preheat opposite side of the board.
A small prheater, like MLINK 853A is a good option.