HP ap5000 All-in-One Point of Sale System User Manual download pdf (Page 28)

Power LED flashes red 4 times, once every second, followed by a 2 second pause, and the computer beeps 4 times;

beeps stop after 5th iteration but LEDs continue flashing.

Cause Solution

Power failure (power supply is overloaded). 1. Check if a device is causing the problem:

a. Remove all attached devices (hard drives, optical

drives, printers, displays).

b. Power on the system.

c. If the system enters POST, power off and replace

one device.

d. If system enters POST, power off and replace

another device until the failure occurs.

2. If the problem persists with all devices removed, replace

the power supply.

3. Replace the Head Unit.

Power LED flashes red 9 times, once every second, followed by a 2 second pause, and the computer beeps 9 times;

beeps stop after 5th iteration but LEDs continue flashing.

Cause Solution

The system power is on, but the computer will not boot. 1. Check if a device is causing the problem:

a. Remove all attached devices (hard drives, optical

drives, printers, displays).

b. Power on the system.

c. If the system enters POST, power off and replace

one device.

d. If system enters POST, power off and replace

another device until the failure occurs.

2. If the problem persists with all devices removed, replace

the Head Unit.

Table 4-2 Solving Power Problems (continued)

20 Chapter 4 Troubleshooting

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 88 89

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HP ap5000 All-in-One Point of Sale System User Manual Page 28