K-Patents PR-21-S - Manual (Page 76)

70 PR-21-S instruction manual
8.1.1 Blank display
Is Power
indicator
light on?
Processor
card LEDs
blinking?
Processor
card LEDs
blinking?
Yes
No
No
Yes
No
No
Yes
Yes
Power supply
problem
Processor card
PR-10500 or
Front panel bad.
Processor card
PR-10500 bad.
Reset contrast backlight,
check display cable,
check backlight cable
Image visible?
Adjust contrast
and backlight
(DTR Main menu >
Display setup >
Contrast&Backlight)
Power supply
problem
Front panel faulty
Processor card
PR-10500 faulty
O
pe
n
Fr
on
t p
an
el
See figure on next page to
troubleshoot power supply.
Contrast and backlight are reset by pressing . during power-up.
Note. This will also temporarily reset the display language.
Next normal power reset will bring back to the original display
language if other than English.
R
em
ov
e
PR
-1
05
00
c
ov
er
Figure 8.3 Troubleshooting a blank display.