An erroneous Trap Error may be caused by the occurrence of multiple Non Maskable Interrupt (NMI) errors. The first NMI error puts the machine into its error recovery process. While the PS/2 is in the error recovery process, a second NMI error occurs. The second error happening before the first error is completely processed, results in an erroneous TRAP error larger than '00FF' being displayed by the error handler (ie, Trap 0458 or Trap 01FF).
The servicer should use their Service Aid Diskette to determine the correct Trap Error located in NVRAM. The last error logged in NVRAM is the TRAP Error that needs to be addressed. Normal Trap Error guidelines should be used to determine what action should be taken based on the error listed in NVRAM.