Chapter 5 Troubleshooting Guidelines
340S2
60
Rev : B
5.6 Keyboard test error (including external K/B & PS/2 mouse)
Symptom: error message of keyboard failure is shown or any key doesn’t work
Keyboard test error
Correct it
Is K/B cable connected to
M/B
properly?
Try another good keyboard
KB Test
Ok?
Replace the faulty keyboard
Replace motherboard
Board level troubleshooting
Re-soldering
One of the following parts or signals on the other
board may be defective, use an oscilloscope to check
1.K/B Controller PC87570
Check for cold
solder?
No
Yes
No
Yes
No
Yes
Summary of Contents for 340S2
Page 6: ...Chapter 1 General System Description 340S2 6 Rev B ...
Page 18: ...Chapter 2 Connectors Switches 340S2 18 Rev B ...
Page 38: ...Chapter 4 System Disassembly 340S2 38 Rev B SB3052P TL594 29LV020 ...
Page 48: ...Chapter 4 System Disassembly 340S2 48 Rev B 4 5 ...
Page 88: ...t 340S2 Rev B ...