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If you are experiencing any problem with your display, before 
calling for service, please review the following troubleshooting 
tips.
There is no picture or sound.

•  Is the power cord disconnected? (See page 13.)
•   Is the main power switch off? (See page 16.)
•   Is the monitor in standby mode (the power LED illuminating 

in orange)? (See page 16.)

•   Make sure correct input mode is selected. (See page 18.)
•   If any external equipment is connected, make sure the 

equipment is operating (playing back).

•  Are the batteries inserted with polarity (+,-) aligned? (See 

page 15.)

•   Are the batteries exhausted?
•   Point the remote control unit toward the monitor’s remote 

control sensor. (See page 15.)

•   Is the menu display hidden or is operation disabled? (See 

page 29.)

•  Are audio cables connected properly?
•  Check the setting of BALANCE for AUDIO menu. (See 

page 23.)

•  Is the sound muted?
•  Make sure the volume is not set to minimum.
•  Are audio cables connected properly?
•  Is the setting of AUDIO SELECT on the SETUP menu 

correct? (See page 23.)

•  The signal may be incompatible.
•  Try the automatic screen adjustment when the D-SUB is 

used.

•  Is the HDMI cable HDMI standard compliant? The monitor 

will not work with cables that are not standard compliant.

•  Is the input signal compatible with this monitor? (See page 

51.)

•  Is the input signal compatible with this monitor? (See page 

51.)

•  Turn off the power to the connected equipment and then 

turn the power on again.

•  If the monitors are connected in a daisy chain, turn off the 

power to all the monitors connected in a daisy chain and 
then turn the power on again.

•  Is the input signal compatible with this monitor? (See page 

51.)

•  Is the input signal compatible with this monitor? (See page 

51.)

•  Is the video cable (Y/Cb/Cr) connected correctly?
•  Is the input mode set to COMPONENT?  

The video will not appear correctly if the input mode is set 
to VIDEO.

•  Is the input mode set to  VIDEO?  

The video will not appear correctly if the input mode is set 
to COMPONENT.

•  Load noises from outside may be interfering with normal 

operation. Turn off the power and turn it on after waiting at 
least 5 seconds, and then check the operation.

•   You may occasionally hear a cracking sound from the 

monitor. This happens when the cabinet slightly expands 
and contracts according to change in temperature. This 
does not affect the monitor’s performance.

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•   When the internal temperature of the monitor rises 

excessively, the brightness of the backlight decreases 
automatically in order to prevent high-temperature-related 
problems. When this occurs, the Power LED flashes red 
and green alternately.

•   If the internal temperature rises further, the monitor 

automatically enters standby mode. (The Power LED 
continues flashing red and green alternately.) 

•   Remove the cause of the excessive temperature rise.

-  If the monitor enters standby mode due to a rise in 

temperature, to return to normal display, turn the power 
switch off and then back on again. The monitor, however, 
will enter standby mode again if the cause of the 
temperature rise is not eliminated. (See page 7.)

-  Check whether the monitor is placed at a location where 

a quick rise in temperature is likely. Internal temperature 
rises quickly if the vents on the monitor are blocked.

-  Internal temperature rises quickly if dust accumulates 

inside the monitor or around the vents. Remove dust if 
possible. Ask SHARP dealer about removing internal dust.

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Model

PN-U553

PN-U473

PN-U423

LCD component

55" Class [54-5/8 inch 

(138.8cm) diagonal] 

TFT LCD

47" Class [46-15/16 

inch (119.3cm) 

diagonal] TFT LCD

42" Class [42 inch 

(106.7cm) diagonal] 

TFT LCD

Max. resolution 

(pixels)

1920 x 1080

Max. colors

Approx. 1.06 billion colors

Pixel pitch

0.630 mm (H) ×  

0.630 mm (V)

0.542 mm (H) ×  

0.542 mm (V)

0.485 mm (H) ×  

0.485 mm (V)

Viewing angle

178° right/left/up/down (contrast ratio ≥ 10)

Screen active area 

inch (mm)

47-5/8 (W) x 26-13/16 (H) 

(1209.6 x 680.4)

40-15/16 (W) x 23 (H) 

(1039.7 x 584.8)

36-5/8 (W) x 20-5/8 (H)  

(930.2 x 523.3)

Computer input signal

Digital (DVI 1.0 standard-compliant), Analog RGB (0.7 Vp-p) [75 Ω], 

DisplayPort 1.1

Sync signal

Horizontal/vertical separate (TTL: positive/negative)

Video color system

NTSC (3.58MHz)/NTSC (4.43MHz)/PAL/PAL-60/SECAM

Plug and play

VESA DDC2B

Power management

VESA DPMS, DVI DMPM

Input terminals

PC/AV

HDMI x 1

PC

Mini D-sub 15 pin, 3 rows x 1

DisplayPort x 1

DVI-D 24 pin (HDCP compatible) x 1

AV

Component: BNC (Y, Cb/Pb, Cr/Pr) x 1*

1

Composite video: BNC x 1*

1

Audio

3.5 mm mini stereo jack x 1

RCA pin (L/R) x 1

Serial (RS-232C)

D-sub 9 pin x 1

Output terminals

PC

DVI-D 24 pin (HDCP compatible) x 1

Audio

RCA pin (L/R) x 1

Serial (RS-232C)

D-sub 9 pin x 1

LAN terminal

10 BASE-T/100 BASE-TX

Speaker output

10 W + 10 W

Power requirement

AC 100 - 240 V, 1.5 A, 

50/60 Hz

AC 100 - 240 V, 1.5 A, 

50/60 Hz

AC 100 - 240 V, 1.3 A, 

50/60 Hz

Operating temperature *

2

41°F to 104°F  

(5°C to 40°C) *

3

32°F to 104°F (0°C to 40°C)

Operating humidity

20% to 80% (no condensation)

Power consumption

(Input signal waiting mode / standby mode *

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)

130 W (4.5 W / 4.5 W) 130 W (4.5 W / 4.5 W) 115 W (4.5 W / 4.5 W)

Dimensions (excluding protrusions) 

inch (mm)

Approx. 49-3/16 (W) x 

2-1/4 (D) x 28-3/8 (H)  

(1250 x 57 x 721)

Approx. 42-5/8 (W) x 

2-3/16 (D) x 24-11/16 (H)  

(1083 x 55 x 627)

Approx. 38-5/16 (W) x 

2-1/4 (D) x 22-1/4 (H)  

(973 x 57 x 565)

Weight  

lbs. (kg)

Approx. 55.2 (25)

Approx. 41.9 (19)

Approx. 35.3 (16)

*1 

Cannot be used simultaneously.

*2 

Temperature condition may change when using the monitor together with the optional equipments recommended by SHARP. In such 

cases, please check the temperature condition specified by the optional equipments.

*3 

Use of the monitors in temperatures below 50°F (10°C) might result in inconsistent image quality that, depending on the viewing angle, 

might be noticeable along the edges of the screen. Please note that this is not a malfunction and does not affect monitor operation.

*4 

When STANDBY MODE is set to STANDARD. When STANDBY MODE is set to LOW POWER: 0.5 W

As a part of our policy of continuous improvement, SHARP reserves the right to make design and specification changes for product improvement 

without prior notice. The performance specification figures indicated are nominal values of production units. There may be some deviations from 

these values in individual units.

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Note that the values shown are approximate values.

Opening height (26-7/8 [683])

Opening width (47-11/16 [1212])

28-3/8 [721]

49-3/16 [1250]

Opening width (41-1/8 [1044])

24-1
1/16 [627]

42-5/8 [1083]

Opening width (36-3/4 [934])

Opening height  (20-3/4

 [527])

22-1/4 [565]

38-5/16 [973]

1

[26]

2-1/4
[57]

VESA holes *

VESA holes *

7-7/8

[200]

7-7/8

[200]

7-7/8

[200]

7-7/8

[200]

7-7/8

[200]

7-7/8

[200]

7-7/8

[200]

1-1/16

[27]

1-1/16

[27]

2-3/16

[55]

Opening height

 

(23-1/8

 [588])

2-1/4
[57]

7-7/8

[200]

VESA holes *

Unit: inch [mm]

Unit: inch [mm]

Unit: inch [mm]

7-7/8

[200]

[PN-U553]

[PN-U473]

[PN-U423]

  When mounting the monitor, be sure to use a wall-mount bracket that complies with the VESA-compatible mounting method. 

SHARP recommends using M6 screws and tighten the screws. 

Note that screw hole depth of the monitor is 3/8 inch (10 mm). Loose mounting may cause the product to fall, resulting in 

serious personal injuries as well as damage to the product. The screw and hole should come together with over 5/16 inch  

(8 mm) length of thread. Use a bracket which has been approved for UL1678 standard, and which can endure at least 4 times 

or more the weight of the monitor.