This article points to cable routing inside the chassis, please be aware of the precautions to prevent damage the comments in chassis.
On FWA-3270 , PSU status can be retrieved through I2C cable which is connected to PSU housing (back plane).
By default, this cable is connected to mother board , so that system can approach PSU status via i2c commands or Advantech utility called "sensor reader"
Sometime, adding LOM (BMC) is an option on FWA-3270. To have BMC can detect PSU status correctly, moving this cable to LOM connector CN4 is required.
FWA-3270 supports BMC and Non-BMC SKU, steps in this article only for BMC (LOM) SKU
Advantech field engineer and RMA members
1. Find PSU detection Cable from PSU backplane
2.Wire this cable to LOM connector CN4, hear the clip sound to make sure it's well-connected.
3.Power On system and check is PSU sensor readings were shown in sensor data record list.