HP ap5000 Maintenance and Service Guide: HP ap5000 All-In-One Point of Sale Sy - Page 78

Diagnostic Front Panel LEDs and Audible Codes, Appendix D - pos computer system

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D POST Diagnostic Front Panel LEDs and Audible Codes Many pre-video conditions on the HP ap5000 POS System can easiliy be diagnosed through various beep and LED codes. The beep and LED blinks repeat for five cycles. Thereafter, only the LED blinks will continue repeating. WARNING! When the computer is plugged into an AC power source, voltage is always applied to the system board. To reduce the risk of personal injury from electrical shock and/or hot surfaces, be sure to disconnect the power cord from the wall outlet and allow the internal system components to cool before touching. Table D-1 Diagnostic Front Panel LEDs and Audible Codes Activity Beeps Possible Cause Recommended Action Green Power LED On. None Computer on. None Red Power LED flashes two 2 times, once every second, followed by a two second pause. Processor thermal 1. protection activated: A fan may be blocked or not turning. 2. OR The heatsink/fan assembly is not properly 3. attached to the processor. Ensure that the computer air vents are not blocked and the processor cooling fan is running. Open hood, press power button, and see if the processor fan spins. If the processor fan is not spinning, make sure the fan's cable is plugged onto the system board header. If fan is plugged in, but is not spinning, then replace heatsink/fan assembly. 4. Contact an authorized reseller or service provider. Red Power LED flashes three 3 times, once every second, followed by a two second pause. Processor not installed (not an indicator of bad processor). 1. Check to see that the processor is present. 2. Reseat the processor. 70 Appendix D POST Diagnostic Front Panel LEDs and Audible Codes

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D
POST Diagnostic Front Panel LEDs
and Audible Codes
Many pre-video conditions on the HP ap5000 POS System can easiliy be diagnosed through various
beep and LED codes. The beep and LED blinks repeat for five cycles. Thereafter, only the LED blinks
will continue repeating.
WARNING!
When the computer is plugged into an AC power source, voltage is always applied to
the system board. To reduce the risk of personal injury from electrical shock and/or hot surfaces, be
sure to disconnect the power cord from the wall outlet and allow the internal system components to
cool before touching.
Table D-1
Diagnostic Front Panel LEDs and Audible Codes
Activity
Beeps
Possible Cause
Recommended Action
Green Power LED On.
None
Computer on.
None
Red Power LED flashes two
times, once every second,
followed by a two second
pause.
2
Processor thermal
protection activated:
A fan may be blocked or
not turning.
OR
The heatsink/fan
assembly is not properly
attached to the processor.
1.
Ensure that the computer air vents are not
blocked and the processor cooling fan is
running.
2.
Open hood, press power button, and see if
the processor fan spins. If the processor fan
is not spinning, make sure the fan's cable is
plugged onto the system board header.
3.
If fan is plugged in, but is not spinning, then
replace heatsink/fan assembly.
4.
Contact an authorized reseller or service
provider.
Red Power LED flashes three
times, once every second,
followed by a two second
pause.
3
Processor not installed
(not an indicator of bad
processor).
1.
Check to see that the processor is present.
2.
Reseat the processor.
70
Appendix D
POST Diagnostic Front Panel LEDs and Audible Codes