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Prestigio Cavaliere 141
8.3 No Display
No Display
Monitor
No
or LCD module
OK?
Yes
Make sure that CPU module,
DDR memory are installed
Properly.
Yes
Display
OK?
No
1.Try another known good CPU
module, DDR module and BIOS.
2.Remove all of I/O device (FDD,
HDD, CD-ROM.......) from
motherboard except LCD or
monitor.
Yes
Display
OK?
No
Replace
monitor
or LCD.
Correct it.
1. Replace faulty part.
2. Connect the I/O device to the
M/B one at a time to find out
which part is causing the
problem.
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.
Replace
Motherboard
System Clock
Parts:
U508
X502
L528
L532
L523
L529
L521
L22
L527
L21
C651
C668
105
Technical Service Manual
Board-level
Troubleshooting
Reset Signal
Signals:
Parts:
Signals:
U501
+3V
U506
+3V
VDD5
U13
CPU_HCLK
H8_RESET#
U522
CPU_HCLK#
CPURST#
U515
NB_HCLK
PWROK_5V
U19
NB_HCLK#
CPU_PWRGOOD
U505
SDR_CLK
PWROK
U17
AGP_CLK0
PCIRST#
Q28
ZCLK0
AC97_RESET#
Q39
CLK_NB_14M
IDE_CD_RESET#
D11
CLK_SB_48M
IDE_RESET#
R158
CLK_PCI_SB
R172
ZCLK1
Q33
CLK_SB_14M
Q506
PCISTP#
Q507
CPUSTP#
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