That via connect the small CXR chip to the huge DSP chip (CXD3098 or something like that) You can put it working again if you connect the point on the CXD chip to the remains of the via. The hole is just a connection to a via which runs under the huge CXP chip.
You will find the "point B" pin of the CXD chip on the Matrix Infinity connection diagrams. It claims the pin as being the main connection point and the via as "alternate" connection point.
SCPH-10000_GH-001 SCPH-15000_GH-003 SCPH-18000_GH-008 SCPH-30001_GH-005 SCPH-30000_GH-016(V4) SCPH-30001_GH-010(V4)
2xSCPH-10190, 2xSCPH-10350, 2xSCPH-10280
"**** j0 hackers!"
-Sjeep (As seen on TOXIC OS ELF...)