126
7321 N/B Maintenance
7321 N/B Maintenance
Correct
It.
Replace the faulty
Keyboard or
Mouse,Touch Pad.
Try another known good keyboard or
mouse,Touch Pad.
KEYBOARD or MOUSE
TEST ERROR
Test
Ok?
Yes
No
Check
U30, J8,
J516,J517 For cold
Solder?
One of the following parts or signals on the motherboard
may be defective, use an oscilloscope to check the signals
or replace the parts one at a time and test after each
replacement.
Yes
No
Replace
Mother board
Re-soldering
Parts
U30 X7
J8,516,507 U24
U510 L63,64
L16 F2
F505 L61
R591 R240
CA5 C266
C279 FA3
Signals
KI{8:0} H8_IRQ1
KO{15:0} SD{7:0}
KBCS# IOW#
IOR# IRQ12
XTAL M_CLK
M_DATA K/M_DATA
K/MCLK H8/T_DATA
H8/T_CLK
Yes
No
Is K/B or
Mouse,Touch Pad cable
connected to notebook
properly?
8.7 Keyboard and Touch-Pad Test Error
Symptom:
Error message of keyboard or touch-pad failure is shown or any key does not work.
Содержание MiNote 7321
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