Selftest Not Successfully Finished

What does - mean?

This code indicates that one or more internal selftests of the LCB_II board's memory (EPROM, EEPROM, RAM) or the Remote Serial Link (RSL) did not complete successfully. A failed selftest can signify a hardware fault, leading to unreliable or non-operational system behavior for the GAA21750AK3 service tool.

• Faulty EPROM, EEPROM, or RAM memory on the LCB_II board.
• Issues with the Remote Serial Link (RSL) communication or module.
• For a new EEPROM, the first test run may result in a failure until checksum verification is established.
• Memory address out of RAM area.

Click steps to track your progress.

1. 1

   Run the selftest multiple times using the GAA21750AK3 service tool to confirm the failure is consistent.

2. 2

   Observe the flashing question mark on the display to identify which specific sub-test (PR EPROM, EE EEPROM, RA RAM, RS Remote Serial Link) is failing.

3. 3

   If the EEPROM test fails on its initial run with a new EEPROM, run it again after the first write operation.

4. 4

   Inspect RSL connections and the associated module if the RS test (Remote Serial Link) fails.

5. 5

   Check for correct memory addresses if configuring memory content, ensuring they are within valid RAM boundaries.