Have T100MD888+, 1 EXP4040, and MD-HMI420. All the LEDS both red and green are on. Online monitoring shows only one green should be on. Otherwise the PLC including the HMI seems to be operating normally. Removing the EXP4040 and plugging the HMI directly to the T100MD888+ the LEDS are all off.
Assuming it a defective chip (which one), since many of the I/O's are not being used at this time, are there other chips I could borrow on one of the boards until I can order a replacement?