Gladius H73X 3730
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Please note that the following troubleshooting guide is designed for people with strong system
hardware knowledge such as System Administrators and Engineers.
Power is on, but no display
A) Check the external power adapter LED is on when the power adapter power switch is in
the on position.
B) Check the Power and CPU fans are running when system power is on.
B-1) Check whether the ATX power switch cable is connected properly to mainboard
J40 (Please refer to 4720 User’s guide).
B-2) Check 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 BIOS 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 BIOS 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 BIOS 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 could be defective.
E-2-5) The LCD panel could be defective.
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