HP ZBook Studio G3 Maintenance and Service Guide - Page 136
Thermal shutdown (hot), Stuck power button, Fan runs constantly, on Update BIOS and drivers
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Thermal shutdown (hot) Symptoms Similar to fan runs constantly issue (Fan runs constantly on page 121) ● System shutdown ● Abnormal heat ● Continually running fan ● Decreased computer performance Note 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 67) 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 76). 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 68). 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 Reducing Heat Inside the PC to Prevent Overheating. Stuck power button 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 76). 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. 122 Chapter 7 Troubleshooting guide