HP 340 Series Service Manual page 103

Table 5-5 shows the general meaning of error codes. These codes are explained further in other
tables. LED patterns are represented by a black dot for on and a white dot for off. Letter
designators indicate the LED in that position is on or off, depending on the binary code used
to represent the device or failure type.
Table 5-5. General Failure LED Indications
Upper 2 Bits Fail Indicator LED Code and Failure Description
State Indication Only: ooSS SSSS
Where SS SSSS Indicates State of Power-up
Required Device Missing or
o.DD DDDD
DTACK Failure: Where DD DDDD Indicates Device
Failing Device: .0DD DDDD
Where DD DDDD Indicates Device
Special Codes (Special Case Highest
••••••••
Priority Codes): LEDs Never Accessed (or Unused Code)
0 ••• ••••
LEDs Failed to DTACK
0000 000.
Timer on processor board has failed or is missing.
Lower 2 Bits State or Device Codes LED Code and Failure Description
Miscellaneous (Highest Priority): XXoo FFFF
Where FFFF indicates Failure (Xs are don't-care bits)
Internal Peripheral Failure (Medium
XXo. PPPP
Priority): Where PPPP is Peripheral Number
I/O Card Failure (Lowest Priority): XX.S SSSS
Where S SSSS is Select Code
LED State and Failure Codes
Table 5-6 lists the LED failure codes used in the SPU's Boot ROMs. Codes are listed here in
numerical order for easy reference, and then again in order of occurrence and priority.
Troubleshooting 91