Maintenance and Service Guide: HP ap5000 All-In-One Point of Sale System

Solving Memory Problems
If you encounter memory problems, some common causes and solutions are listed in the following
table.
CAUTION: Power may still be supplied to the DIMMs when the computer is turned off. To avoid
damage to the DIMMs or the system board, you must unplug the computer power cord before
attempting to reseat, install, or remove a DIMM.
Table 4-3 Solving Memory Problems
Memory count during POST is wrong.
Cause Solution
The memory modules may not be installed correctly. Check that the memory modules have been installed
correctly and that proper modules are used.
Integrated graphics may use system memory. No action required.
Power LED flashes red 5 times, once every second, followed by a 2 second pause, and the computer beeps 5 times;
beeps stop after 5th iteration but LEDs continue flashing.
Cause Solution
Memory is installed incorrectly or is bad. 1. Reseat DIMMs. Power on the system.
2. Replace DIMMs one at a time to isolate the faulty
module.
3. Replace third-party memory with HP memory.
4. Replace the Head Unit.
Solving Processor Problems
If you encounter processor problems, common causes and solutions are listed in the following table.
Table 4-4 Solving Processor Problems
Power LED flashes red 3 times, once every second, followed by a 2 second pause.
Cause Solution
Processor is not seated properly or not installed. 1. Check to see if the processor is present.
2. Replace the Head Unit.
Solving Display Problems
The primary monitor for the ap5000 is a part of the Head Unit. This monitor has no front panel
controls and powers on when you turn the Head Unit on. Brightness is adjusted through F10 setup.
Even the lowest brightness setting in F10 Setup (Advanced > Manual Brightness Setting) will
produce video and not blank the screen.
Solving Memory Problems 21