Sharp LCD Monitor Troubleshooting Guide for PN-L702B Series
Page 51

Troubleshooting

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 14.)

•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 21.)

•If any external equipment is connected, make sure the equipment is operating (playing back).

Remote control does not work.

•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 31.)

Sound from left and right speakers is reversed. Sound is heard from only one side.

•Are audio cables connected properly? (See pages 12 to 13.)

•Make sure audio cables for external speakers are connected properly: left and right cables may be reversed or one of the two cables may not be connected. (See page

13.)

•Check the setting of BALANCE for AUDIO menu. (See page 25.)

There is a picture but no sound.

•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 OPTION menu correct? (See page 26.)

•Is the setting of SPEAKER SELECT on the SETUP menu correct? (See page 26.)

Unstable video.

•The signal may be incompatible.

•Try the automatic screen adjustment when the PC D-sub input terminal or PC RGB input terminals are used.

•If the top and bottom of the image are not horizontally aligned, set TOUCH PANEL MODE on the OPTION menu to OFF.

The video from the PC/AV HDMI input terminal does not appear properly.

•Is the setting for HDMI of INPUT SELECT on the OPTION menu correct? (See page 26.)

•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 55.)

The video from the PC/AV DVI-D input terminal does not appear properly.

•Is the setting for DVI of INPUT SELECT on the OPTION menu correct? (See page 26.)

•Is the input signal compatible with this monitor? (See page 55.)

•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.

The video from PC D-SUB, PC RGB, AV COMPONENT, or AV VIDEO does not appear correctly.

•Is the setting for BNC or D-SUB of INPUT SELECT on the

OPTION menu correct? (See page 26.)

•Is the input signal compatible with this monitor? (See page 55.)

Control buttons do not work.

There is no picture.

•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.

The input mode changes automatically.

•When the AUTO INPUT CHANGE is ON and no signal is present in a selected input mode, the AUTO INPUT

CHANGE automatically changes the selected mode to a mode where a video signal is present.

The input mode may change in the following cases:

-When a computer is in standby mode.

-When video play is stopped with a playback device.

The touch panel does not respond.

•Is the USB cable connected properly? (Touch Panel Driver

Operation Manual)

•Has the touch panel driver been installed? (Touch Panel Driver Operation Manual)

•Has the pen tip of the touch pen become worn? Replace the pen tip. (See page 20.)

•Is the battery inserted in the wrong orientation (+, -) in the touch pen? (See page 18.)

•Is the touch pen battery exhausted?

The response of the touch screen is slow.

Some parts of the screen do not respond.

•Is the screen exposed to direct sunlight or other strong light? The touch panel uses infrared rays and thus may not operate correctly.

•Is there an obstacle between the infrared transmitter/ receiver and the touch pen or your finger? An obstacle will prevent correct operation. If your fingers or a sleeve are too close to the screen, correct operation will not be possible.

•Is the infrared transmitter/receiver dirty? Gently wipe off any dirt with a soft cloth.

•If the touch panel is touched with a small tip less than about 3/16 inch (4 mm) x 3/16 inch (4 mm), the touch may not be detected by infrared and correct operation will not take place.

•When starting your computer or connecting the USB cable, do not touch the touch panel. If you touch the touch panel, this may be detected as an element failure in the infrared transmitter/receiver and incorrect operation will result.

Power LED flashes red.

“STATUS [xxxx]” appears in the corner of the screen.

•Hardware has a problem. Turn off the monitor and request repair from your SHARP dealer.

(When STATUS ALERT is set to OSD & LED. This varies depending on the setting.)

The touch panel power LED lights red.

•Hardware has a problem. Turn off the monitor and request repair from your SHARP dealer.

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Contents PN-L702B Brown For Customers in U.KGREEN-AND-YELLOW BlueImportant Information Refer Servicing to Qualified Service PersonnelOther Countries outside the EU Information on Disposal for Users private householdsInformation on Disposal for Business Users European UnionDear Sharp Customer Safety Precautions Tips and Safety Instructions Mounting Precautions Contents Supplied ComponentsSystem Requirements Part Names NFront viewNRear view 11 E NRemote control unit Part NamesSignal transmitter Power button See Mute button SeeConnection with a PC or AV equipment Connecting Peripheral Equipment13 E Connecting Peripheral EquipmentHandles can be removed Connecting the Power CordBinding Cables Removing the Handles15 E Preparing the Remote Control UnitInstalling the batteries Remote control operation rangeStatus Status of the monitor Turning Power On/OffTurning power on/off Turning on the main power17 E Disabling power on/off operationsNDate/time setting Turning Power On/OffTouch action Inserting the batteryTouch action and touch mode Touch Pen Preparations/Touch Action19 E Touch Pen Preparations/Touch ActionNFinger actions Other functions EraserNPen actions Menu Basic Operation21 E MuteCut off Basic Operation NSwitching the screen sizeWide Zoom Normal Dot by DotMenu Items 23 EDisplaying the menu screen NPICTURE Menu item detailsMenu Items NSCREENMenu Items NSETUP 25 ENAUDIO NOPTION Menu Items NPIP/PbyP 27 EPbyP NZOOM2 Special SettingMenu Items NDual screen display PIPDAY of the Week Power29 E NSCHEDULEAdjustments for PC screen display NAutomatic adjustmentNScreen display for adjustment 31 E Communication conditions Communication procedureControlling the Monitor with a PC RS-232C PC connection33 E NResponse code formatNID numbers OK 002 IDLK0000 ← Wait ← OK 002 ← VOLM0010 OK 001 ← 002VOLM0030 VOLM0020 ←35 E Setting of the Gamma user dataCommand Command field See Direction RS-232C command tablePower control/Input mode selection How to read the command tableControlling the Monitor with a PC RS-232C Screen menu 37 EControlling the Monitor with a PC RS-232C Picture menu Setup menu 39 EControlling the Monitor with a PC RS-232C Audio menu Controlling the Monitor with a PC RS-232C Option menu Initialization/Functional Restriction Setting Function menu 41 EControlling the Monitor with a PC RS-232C PIP/PbyP menu Controlling the Monitor with a PC RS-232C Others Commands for setting of the Gamma user dataTo set on the monitor Settings to connect to a LANControlling the Monitor with a PC LAN 43 EControlling the Monitor with a PC LAN To set from a PC Default Gateway 0.0Basic operation 45 EControlling with a PC Controlling the Monitor with a PC LANInformation Standby mode, Power on is the operation availableAccept IP Address User Name / Password47 E DNS ServerMonitor Name Installation Information NAME/LOCATIONAuthentication Account Name / PasswordConfirmation 49 ERecipient E-MAIL Addresses ConditionVersion Snmp SettingTrap Setting Trap Setting of Authentication Error51 E TroubleshootingTroubleshooting When Auto Dimming is displayedMonitor makes a cracking sound Specifications NProduct Specifications53 E NDDC plug and play Specifications NDimensional DrawingsNPower management Dmpm Digital Monitor Power ManagementSpecifications NCompatible signal timing PC NCompatible signal timing AV55 E NPC/AV Hdmi input terminal pins Specifications NPC/AV DVI-D input terminal pinsNPC D-sub input terminal pins NPC/AV DVI-D output terminal pins57 E NAttaching the TraySecure the tray PN-L702B Mu EN11H1
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PNL702BPKG2A, PNL702B, PN-L702B specifications

The Sharp PN-L802B, PN-L602B, PN-L702B, and PNL802B and PNL602B are a series of cutting-edge interactive displays that focus on enhancing collaboration and communication in various settings, including educational institutions, corporate environments, and creative studios. These models are designed to transform the way users engage with content, enabling seamless collaboration and improving overall productivity.

One of the standout features of the Sharp PN-L series is its large-sized display technology, with models such as the PN-L802B boasting an impressive 80-inch diagonal screen and the PN-L602B offering a 60-inch option. These expansive screens provide vivid visuals with 4K Ultra HD resolution, delivering stunning clarity and detail that captivates viewers. The enhanced brightness and wide viewing angles ensure that content is easily viewable from various positions in the room.

Touch technology is another defining characteristic of the Sharp PN-L series. The displays utilize advanced infrared touch technology, allowing for up to 10 points of simultaneous touch. This multi-touch capability enables multiple users to interact with the display at the same time, fostering a dynamic and interactive experience for collaboration and brainstorming sessions. The seamless touch responsiveness enhances user engagement, making it easier to navigate content and annotate directly on the screen.

The models also come equipped with Sharp's powerful software solutions, such as the easy-to-use Sharp Pen Software, which allows users to write and draw directly on the screen, making annotations and modifications in real-time. Additionally, the displays support various connectivity options, including HDMI, USB-C, and wireless sharing, facilitating easy integration with other devices and systems.

Moreover, the PN-L series is designed with a focus on durability and ease of use. The anti-glare surface reduces reflections and distractions, while the ergonomic design ensures that the displays can be easily installed at convenient heights for user interaction. Enhanced security features are also built in, safeguarding content and user data.

In summary, the Sharp PN-L802B, PN-L602B, PN-L702B, PNL802B, and PNL602B bring together large-scale interactive technology, rich visuals, and collaborative features that set a new standard for interactive displays. Their versatility and advanced capabilities make them an ideal choice for any environment where teamwork and communication are pivotal.
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