TravelMate 4320/4720 and Extensa 4220/4620 Service Guide
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...does not work correctly. System hangs intermittently. External display does not work . Refresh battery (continue use battery until power off, then charge battery). Battery pack Mainboard Reconnect hard disk/CD-ROM drives. Hard disk connection board Mainboard Peripheral-Related Symptoms Symptom / Error System configuration...Mainboard Remove battery pack and let it cool for 2 hours. USB does not work correctly Print problems. Serial or parallel port device problems. Action in the Devices Configuration" of BIOS Setup Utility is set to Enabled. Printer driver Printer cable Printer Mainboard ...
...does not work correctly. System hangs intermittently. External display does not work . Refresh battery (continue use battery until power off, then charge battery). Battery pack Mainboard Reconnect hard disk/CD-ROM drives. Hard disk connection board Mainboard Peripheral-Related Symptoms Symptom / Error System configuration...Mainboard Remove battery pack and let it cool for 2 hours. USB does not work correctly Print problems. Serial or parallel port device problems. Action in the Devices Configuration" of BIOS Setup Utility is set to Enabled. Printer driver Printer cable Printer Mainboard ...