HP EliteDesk 800 Maintenance and Service Guide - HP EliteDesk 800 G1 Tower, HP - Page 241

Solving processor problems

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Power LED flashes Red five times, once every second, followed by a two second pause, and the computer beeps five times. (Beeps stop after fifth 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 system board. Solving processor problems If you encounter processor problems, common causes and solutions are listed in the following table. Poor performance is experienced. Cause Processor is hot. Solution 1. Make sure the airflow to the computer is not blocked. 2. Make sure the fans are connected and working properly (some fans only operate when needed). 3. Make sure the processor heat sink is installed properly. Power LED flashes Red three times, once every second, followed by a two second pause. Cause Solution Processor is not seated properly or not installed. 1. Check to see that the processor is present. 2. Reseat the processor. Power LED flashes Red eleven times, once every second, followed by a two second pause. Cause Solution The current processor does not support a feature previously enabled on this system. 1. Install a TXT (Trusted Execution Technology) capable processor. 2. Disable TXT in the Computer Setup (F10) utility. 3. Reinstall the original processor. Solving processor problems 229

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Power LED flashes Red five times, once every second, followed by a two second pause, and the
computer beeps five times. (Beeps stop after fifth 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 system board.
Solving processor problems
If you encounter processor problems, common causes and solutions are listed in the following table.
Poor performance is experienced.
Cause
Solution
Processor is hot.
1.
Make sure the airflow to the computer is not blocked.
2.
Make sure the fans are connected and working properly
(some fans only operate when needed).
3.
Make sure the processor heat sink is installed properly.
Power LED flashes Red three times, once every second, followed by a two second pause.
Cause
Solution
Processor is not seated properly or not installed.
1.
Check to see that the processor is present.
2.
Reseat the processor.
Power LED flashes Red eleven times, once every second, followed by a two second pause.
Cause
Solution
The current processor does not support a feature previously
enabled on this system.
1.
Install a TXT (Trusted Execution Technology) capable
processor.
2.
Disable TXT in the Computer Setup (F10) utility.
3.
Reinstall the original processor.
Solving processor problems
229