PEB-4720 Main Board
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Please note
that the following troubleshooting guide is designed for people with strong
computer hardware knowledge such as System Administrators and Engineers.
Power is on, but there is no Panel Display
A)
Check that the external power adapter LED is on when the power adapter power switch
is in the on position.
B) Check that the Power and CPU fans are running when system power is on.
B-1)
Check whether the ATX power switch cable is properly connected to mainboard
J40 (Please refer to 4720 User’s guide).
B-2)
Check that the power cable is connected properly between 9000PB0700
primary I/O board CON101 and mainboard J2.
B-3)
Check the 12V CPU Power cable is connected properly between CON101 of I/O
board 9000PB0700 to J13 on the motherboard.
C)
Please ensure that the IDE cable is properly connected to the HDD and the red stripe on
the ribbon cable is aligned with PIN 1 on the IDE connector of HDD.
D)
Reset CMOS DATA by shorting mainboard JP2 PIN3 and PIN2 for a few seconds
(Please refer to 4720 User’s guide).
E)
Check if the system is beeping.
E-1)
A single long repeated beep indicates that a DRAM error has occurred. Make
sure DRAM is properly installed or replace DRAM.
E-2)
One short beep after power on
,
means the system board is OK, but the LCD
panel or onboard VGA interface could be defective.
E-2-1) Check CMOS Setup/Advanced Chipset Features/Panel Number is set
to 800x600 resolution. Note. If this setting has been accidentally set to a
resolution higher than 800x600 you will need to attach an external
monitor to the VGA port to be able to see the CMOS Setup screen. Also
check Boot Display = CRT+LVDS
E-2-2) Check the inverter cable is connected properly between the Inverter
and motherboard J37.
E-2-3) The connection between the LVDS connector on motherboard J38 and
the LCD panel is not connected properly or LCD cable could be
defective.
E-2-4) The Inverter cannot produce backlight.
E-2-5) The LCD panel could be defective.
