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Taxi Roof LED Display Trouble-shooting

Problems

Nothing

displayed

on the whole

LED display

Display Chaos

"No Display

Found"when

running the

terminal

Display

images

ﬂashing

Display

images

misplace or

repeated

Single

cabinet not

working

Single

module not

working

Color missing

on the

module

Single LED

not working,

or missing

color

The LED

display is out

of control

Possible Reasons

1.No power to the

display;

2.The LED display is

shut by the software;

3.Controller problem;

4.No display program

ﬁle on the controller.

1.Incorrect program;

2.Incorrect resolution

setting.

1.No signal; connection

to the SIM card;

2.Display power failure

1.Ribbon cable loose;

2.Power cable loose.

Improper conﬁguration

program.

1.Power supply damage

2.Controller damage

1.Improper power supply;

2.Ribbon cable to this

module is loosen.

3.Input ribbon cable to this

module is damaged.

4.Signal IC of this module

is damaged

5.No signal output from

the module before this one.

1.Ribbon cable to this

module is loosen

2.Input ribbon cable to this

module is damaged

3.IC damaged.

1.LED damage, or pins

fake-solder or short-circuit

LED

2.Control IC to this LED is

damaged

1.Terminal setting not

correct

2.Weak signal of the

control system

3.Cabinet or module

1.Proper AC power to the LED display;

2.Set the control software as working status;

2.Check if controller is connected properly: Green

indicator ﬂashing, and Red indicator ON. The Green

indicator is ON or OFF in case that sending card is

damaged or no signal. In this way, the control card shall

be replaced;

4.Run the control software, upload the proper program

ﬁle, and send to the receiving cards of the screen, then

save it.

1.Check if all programs are correct, or contact

the supplier if the programs are lost;

2.Reset the resolution (It shall be connected to the

terminal after changing the resolution).

1.SIM card socket damaged, no network traffic to

the SIM card; Replace the card socket or SIM card

2.Connect the LED display to power.

1.Re-connect the ribbon cables between modules

2.Re-connect the power cables and ﬁx them by screws.

Resetting the conﬁguration program and the display

connection program as per signal cable direction, then

send it to the display and save it.

1.Check if power supply is proper in this cabinet

2.Check if controller card is powered properly (Red

indicator ON), if there is signal transmission (Green

Indicator Flashing); Cards need to be replaced if Green

indicator ON or OFF.

1.Check if power supply voltage is proper

2.Re-insert the loosen ribbon cables

3.Replace the input ribbon cable of this module

4.Replace a new module

5.Replace the module before this one.

1.Re-insert the loosen ribbon cables

2.Replace the input ribbon cable of this module

3.Check and replace damaged IC related

1.Re-solder the pins of the LED or the control IC, or

replace new LEDs

2.Replace new IC

1.Check if the terminal setting is correct;

2.Check the signal connection strength;

3.Check if any problems to the display modules.

Solution