HP ZBook 17 Maintenance and Service Guide - Page 162
Thermal shutdown (hot), Stuck power button, Items, Procedures, Thermal-related issue, General actions
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Thermal shutdown (hot) Items Symptoms Similar to fan runs constantly issue (Fan runs constantly on page 147) ● System shutdown ● Abnormal heat ● Continually running fan ● Decreased computer performance Note Procedures Possible causes BIOS not up to date, thermal condition (fan, air flow) Troubleshooting steps 1. Update BIOS and drivers (4. Update BIOS and drivers on page 94) and reset BIOS to default. BIOS may implement new fan characteristics and updates for other component. 2. Perform a hard reset (8. Hard reset on page 102). Performing a hard reset can reset recorded thermal values in memory. 3. Determine whether you are using a correct AC adapter. 4. Be sure to turn power off completely when putting a notebook in a travel bag. Thermal-related issue 1. Verify thermal condition: a. Check fan and connection. Reseat fan cable. b. Be sure that no obstructions or dust are in heat sink fan, fin, or vent. c. Be sure that the notebook is not sitting on a hot surface that blocks vent intakes. d. Test fan using HP PC Hardware Diagnostics (UEFI) tool (6. HP Hardware Diagnostics and Tools on page 95). Be sure that the fan is not producing a loud noise and that fan blades spin correctly. e. Test with a verified working fan. f. Remove old thermal compound and pads, and replace properly with new pads. 2. Verify thermal solution: ○ Use Thermal Monitor tool (available only to authorized service providers/ technicians) to run stress test (processor and GPU) and verify that thermal sensors are within limits after thermal condition is serviced. See https://support.hp.com/us-en/document/c01657439. Stuck power button Items Procedures Symptoms ● Rear power indicator light is on ● Will not turn on when power button is pressed ● Automatically powers on Possible causes Sticky or defective power button. Troubleshooting steps General actions 1. Perform a hard reset (8. Hard reset on page 102). 2. Perform a soft reset if system can turn on. The sections below are intended for authorized service providers/technicians. 1. Disassemble the unit. 2. Inspect power button on the top cover and on the system board to make sure these buttons moves freely. 148 Chapter 7 Troubleshooting guide