Display (Lcd) Hardware - Smart AY Tango Service Manual

Replacing the PANCPU can be done without any disassembly of the module.
Simply remove the 2 screws from the PANCPU and disconnect the blue Ethernet
cable. Now you can carefully pull the PANCPU clear of the 120way connector.
This connector is fragile so take extra care with it during assembly and
disassembly.
11.

DISPLAY (LCD) HARDWARE

Graphics problems with the console can be divided into 2 categories, hardware
problems or driver / configuration problems. When the console first boots, the
BIOS will display the message "Console Starting. Please Wait........" in a
diamond shape. If you can see this message clearly then the display hardware is
most likely OK and you should proceed to section 3 to resolve a graphics driver
properties problem. If the display is blank, fuzzy or a series of striped lines
during this stage of bootup you also need to check the hardware as detailed
below.
The console LCD is a 22" (16:9) unit. It has a separate inverter PCB for driving
the backlight. The graphics are driven directly from the PC via a digital LVDS
bus.
The backlight is powered on as soon as the console power button is pressed,
resulting in a white illumination to the LCD for a few seconds. If the display
does not light up (assuming the rest of the console powers up - indicated by a
beep from the motherboard as it boots) then there is a problem with the
backlight. Without the backlight the display will remain black, even after the
console boots up. Check the backlight hardware as follows.
• Locate the inverter PCB and check and re-seat the 4 backlight cables from the
inverter to the LCD backlights.
Tango Smart Console™ Service Manual
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14 Oct 2009 33