Black Box SW627A-R2, SW628A-R2 manual Common Problems, Troubleshooting

CHAPTER 5: Troubleshooting

5.2 Common Problems

5.2.1A CPU CONNECTED TO YOUR SWITCH DOESN’T BOOT, AND YOU GET A KEYBOARD OR

MOUSE ERROR

A. First make sure that the CPU is in fact connected to the ServSwitch Jr. MP and that the Switch is receiving power. (One of the Switch’s numbered CPU ports must be cabled to the keyboard port of a powered CPU in order for the Switch to work properly.)

B. If the Switch is ON, make sure its keyboard and mouse settings are correct.

C. If the configuration is OK, check your cables. Tighten any loose connections. If the keyboard and mouse strands of the CPU Cable have been reversed, plug them into the proper ports.

D. If you don’t find a cable error, try swapping in different keyboards and/or mice one at a time. If the problem goes away when you substitute a device, the old one might have gone bad.

E. If swapping input devices doesn’t solve the problem, begin swapping your cables one at a time. If the problem goes away when you substitute a cable, the old cable is probably defective.

F. If swapping cables doesn’t solve the problem, and the Switch is a 4-port (SW628A-R2) model, try plugging the CPU into the other CPU port on the Switch that’s designed for that platform (that is, the other PC port or the other Mac port). If the CPU boots when it’s connected to a different port, the old port is probably defective.

G. If you’re using an SW627A-R2 or if swapping ports doesn’t solve the problem, try plugging a known-good keyboard and mouse directly into the CPU that’s having the problem. If the CPU boots, the Switch might be defective; call Black Box.

H. If the CPU still doesn’t boot, the CPU’s keyboard or mouse port (or other components) might be defective. (If the CPU’s Power LED doesn’t light, the fuse on the CPU’s motherboard might be blown.) If you still have them, plug that CPU’s original monitor, keyboard, and mouse into it and try again. If the CPU does not boot with its original equipment, something in the CPU is defective; call the CPU’s manufacturer. If the CPU does boot, there is some kind of unusual mismatch between that CPU and the shared monitor, keyboard, or mouse; call Black Box for technical support.

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