170
LCD PC E
LCD PC E
-
-
8188 MAINTENANCE
8188 MAINTENANCE
Connect the I/O device & cable
to the M/B one at a time to find
out which part is causing the
problem.
1.Confirm video card and check the
card is connected properly.
2. Try another known good
video card module.
Replace faulty
video card
AGP Controller Failure
Display
OK?
Remove all the I/O device & cable from
motherboard except video card
Display
OK?
Yes
No
Yes
No
Board-level
Troubleshooting
Replace
Motherboard
One of the following parts on the mother-board may be
defective, use an oscilloscope to check the following signal or
replace the parts one at a time and test after each replacement.
Parts:
Signals:
AGP_FRAME#
AGP_DEVSEL#
AGP_IRDY#
AGP_TRDY#
AGP_STOP#
AGP_PAR
AGP_REQ#
AGP_GNT#
AGP_AD[0:31]
AGP_CBE#[0:3]
AGP_ST[0:2]
AGP_RBF#
AGP_WBF#
AGP_PIPE#
AGP_ADSTB[0:1]
AGP_ADSTB#[0:1]
AGP_SBSTB
AGP_SBSTB#
AGP_PCIRST#
66M_AGP
AGP_SBA#[0:7]
LID#
PWROK
ENABKL
BLADJ
U4
U14
U24
D27
JL17
J10
F1
L4
L5
L5
C1
VR1
D2
9.3 AGP Controller Failure
Symptom: There is no display although power-on-self-test is passed.
Replace
Motherboard
Board-level
Troubleshooting
Parts:
Signals:
TXOUT+[0:7]
TXOUT-[0:7]
TX
TXCLKOUT0-
TX
TXCLKOUT1-
LCD_ID0
LCD_ID1
+PANEL_VDD
XTALIN
XTALOUT
U2
X1
R50
C575
C576
R34
Q[5:8]
R39
D4
R12
R11
C3
J2
F2
J5
J6
L513
C566
R44
C24
One of the following parts on the VIDEO CARD may be
defective, use an oscilloscope to check the following signal or
replace the parts one at a time and test after each replacement.
Summary of Contents for E - 8188
Page 6: ...5 LCD PC E LCD PC E 8188 MAINTENANCE 8188 MAINTENANCE 1 2 System Hardware Parts ...
Page 54: ...53 LCD PC E LCD PC E 8188 MAINTENANCE 8188 MAINTENANCE ...
Page 55: ...54 LCD PC E LCD PC E 8188 MAINTENANCE 8188 MAINTENANCE ...
Page 93: ...92 LCD PC E LCD PC E 8188 MAINTENANCE 8188 MAINTENANCE 1 6 1 System Power Management States 2 ...
Page 95: ...94 LCD PC E LCD PC E 8188 MAINTENANCE 8188 MAINTENANCE 1 7 1 ICH4 GPIO Definitions 2 ...
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