Legamaster PTX-8500 UHD, Service Manual, Page: 20 / 21

Page 20/21
Service Manual: PTX8500 UHD
Q2. How to check the normal booting of the monitor.
Ans.:
Step1. Disconnected all video cable.(VGA, DVI, Audio,…etc.)
Step2. Connect the AC power cord only.
Step3. Turn on the AC switch.
The normal boot status as Fig. A
(
U
Fig. A
U
)
Booting Status Table
Status Descriptions Image
A Turn on the AC power and click sounds from
PSU
Abnormal:
Check AC power source.
Check PSU functions
B Show black screen and Orange LED On /
Blinks. (light on and off)
Abnormal:
Check OSD setting and firmware
Check AD board
C Show black screen and see the light from backlight.
(Backlight ON)
Abnormal:
Check PSU(12 and 24V) functions
Check AD board
D
Show “No video input”
Abnormal:
Check source cable
Check OSD setting and firmware
Check AD board