Symptom

Performance

Call Center:

Repair Center:

Suggestions

Likely Causes

Repair Center: Comments

Notebook still on but stops responding.

Notebook pauses or runs sluggishly.

Press Ctrl+Alt+Del and end any application not responding.

Press and hold the power button four seconds to turn off and reset notebook, then press the power button to turn the notebook back on.

If this fails, use a pen to press reset switch, then press power button to turn notebook back on.

May be normal Windows behavior (background processing can affect response time).

Certain background operations (such as virus scanning software) can affect performance.

Press Ctrl+Alt+Del to see if an application is not responding.

Restart notebook.

If hard disk has spun down to conserve power, it can take several seconds to spin up. If needed, use Power Options in Control Panels to change hard disk time-out to match standby time-out.

Some file browsers respond slowly while processing graphics or waiting for broken network connections to time out.

Check for overheating—see previous symptom.

If notebook’s hard disk drive runs frequently (as indicated by notebook’s hard disk drive access light) while notebook appears to be paused or running slowly, consider installing additional SDRAM.

Check available free disk space. Delete temporary and unneeded files.

Fan.

Heatsink. CPU module. Motherboard.

If notebook slows after period of continuous activity, check heatsink—see previous symptom.

3-20 Troubleshooting and Diagnostics

HP Pavilion zt1100/xz100 Omnibook xt1000