Usb Symptoms; Peripheral-Device Symptoms; Boot Symptoms - Partner SP-850 Service Manual

USB symptoms

Symptom
• USB device does not function

Peripheral-device symptoms

Symptom
• USB ports do not work
• COM ports do not work

Boot symptoms

Symptom
• System continually reboots on
power up
48 C H A P T E R 4 L O C A T I N G T H E P R O B L E M
Corrective Procedure
1. Check that the USB device is detected in Windows Device
Manager.
2. Reinstall the USB device driver.
3. Replace the mainboard.
Corrective Procedure
1. Reseat the I/O cable.
2. Reinstall the drivers.
3. Replace the mainboard.
Corrective Procedure
1. Restore the BIOS defaults.
2. Remove all I/O device drivers, then reinstall the drivers one
by one.
3. Reseat the SATA cable.
4. Reseat the memory card.
5. Reseat the power adapter.
6. Replace the mainboard.