Hi,
Today's PCB boards are very often multi-layered and components are also often SMT based ones. Unless one has SMT soldering station and special skill to deal with multi-layer board It is not an easy task. And ASIC kinda parts is almost impossible to find unless you find a source dealing in 1000 pieces minimum order, etc. Specific component level failure is some times by poor QC screening process.
Today's PCB boards are very often multi-layered and components are also often SMT based ones. Unless one has SMT soldering station and special skill to deal with multi-layer board It is not an easy task. And ASIC kinda parts is almost impossible to find unless you find a source dealing in 1000 pieces minimum order, etc. Specific component level failure is some times by poor QC screening process.