InfoCor's service department receives many questions each day
concerning general audiovisual technology usage along
with specific questions about troubleshooting products. We have identified a number
of frequently asked questions we feel may be of
interest to our clients.
Show all answers | | Close all answers
Projector, Plasma & LCD Display Issues
There is no picture...
1) Check the power. Verify the main power switch (usually located on the rear, side or bottom of the unit) is turned to the on position
2) Check the display for the source. Verify the data source is turned
on and operating properly and that all cables are connected and functioning properly. Verify that the proper input is selected on the display.
Use the remote control to change the source. Some remotes have a single button labeled “Source” or “Input” which, when pressed repeatedly, will cycle through all the sources. Others have individual buttons for each source. A computer source is typically referred to as “PC” or “RGB".
Verify that the PC is set to output to the display properly. This is typically a problem with laptops not sending a signal to the external VGA port. Most laptops have a key combination to press which turns on this port. Typically for Dell laptops it is Fn+F8. HP is Fn+F4. IBM is Fn+F7. (Note that the particular combination may be different for your laptop.)
3) Check all connectivity. Verify the video cable is plugged into the source.
4) Check for physical damage to the cabling (bent pins, etc). Inspect the inside of the cable connector to verify that all the pins are straight and
that there is no visible damage to the cable. Move the end of the cable, while hooked up to your pc/laptop and see if the image comes on.
5) Verify that the projector is not overheating. Turn off the main power switch and check to see if the air inlet/outlet vents or air filter are clogged with dust or another object. If so, remove the object and/or clean the passage or filter. Leave the projector turned off for 10 minutes. Turn on the projector and resume.
6) Verify that the projector doesn't doesn't have a bad lamp. The lamp may have exceeded normal operating hours or may be burnt out. Replace with a new lamp. If you hear a small popping noise or see a small plume of smoke project from the rear of the projector in most cases the lamp has burst inside the projector. This is most commonly seen when the lamp has been used in excess of its normal usage hours or when the projector has been bumped or hit during use. If this occurs you will need to replace the lamp inside the projector for it to work properly again. Depending on the type of lamp the projector uses, the projector may need to be returned to the manufacturer for cleaning. Average lamp life ranges from 1,500 – 2,000 hours, although some newer lamps can last up to 5,000 to 6,000 hours. Lamp life varies by manufacturer and model of the projector itself.
7) Check the projector status lights. Projectors will typically have 2-4 status lights on the top of the unit. These lights will signify normal operation as well as a variety of error conditions. Consult your projector’s user manual or contact InfoCor to interpret the lights.
8) Other things to consider: The display may have been turned on again too soon after it was turned off, wait for the lighting sequence to correct itself. The power was turned off or removed while the fan was running, during or after lamp operation. Room temperature is too high for proper operation.
The picture is not how it should look...
1) Color issues: If the image is missing a color (e.g. no red) – replace video cable from source (usually for laptops). If you notice intermittent pictures or a flooding of color on the screen that is not normal, perhaps all blue, green, or red then you will need to replace the cable that is located at the table. Notify InfoCor or your technical support personnel to get the replacement cables needed.
If the image is “Floody” or blotchy in color, this typically means the polarizer in the projector is damaged. The projector will need to be sent to the manufacturer for repair
2) Distorted picture: Adjust aspect ratio on projector or LCD/plasma. This can be the case when the aspect ratio of the source (typically PC or laptop) is different from that of the projector or LCD/plasma. If a standard aspect laptop (4:3) is displayed on a wide-screen (16:9) display, sometimes the image will be stretched so it fills the screen. Look on the remote control for an “Aspect” button, or look through the menu options for “Normal”.
3) Cropped picture: Check video card settings on your laptop or computer to verify
that the resolution and refresh rates are within the capabilities of the projector. Refresh rates will be based on video cards that are installed into your equipment. The best image will come when the resolution of your computer matches the “native resolution” of the projector.
• VGA has a resolution of 640 pixels x 480 pixels.
• SVGA has a resolution of 800 x 600 pixels.
• XGA has a resolution of 1024 pixels x 768 pixels.
• SXGA has a resolution of 1280 x 1024 pixels.
• WXGA Wide has a resolution of 1280 pixels x 768 pixels.
The display is not responding to the IR remote control...
1) Check the batteries. Verify the remote control has new batteries
2) Check the sensor & emitter. Visually inspect to verify nothing is blocking the outside of the display case where the IR receivers are located. Also make sure the emitter on the remote is free from any obstruction.
3) Check the multifunction selection. Some remote controls have an on/off or a multi-functioning use and you will need to make sure the selectors are in the proper position
Sound Issues
I do not hear any audio...
1) Check the device power. (source, amplifier, switcher) Verify in your rack location that all devices are powered on. Most equipment will have one or more lights to indicate proper operation. Contact the InfoCor Service Department if you are having trouble determining if your equipment is powered on or not.
2) Check audio cables from source. Verify that all audio cables are plugged in properly and have no apparent physical damage
3) Check that the source is outputting sound. This is often a problem with laptops. Many laptops have numerous places to adjust sound levels. (e.g. Windows Media Player, Real Player, Internal PC sound card)
The audio quality is distorted...
1) Check audio cables from source. Verify that all audio cables are plugged in properly and have no apparent physical damage
2) Check that the source and/or amplifier volume. If the source or amp volume levels have exceeded nominal levels, you can overdrive the signal and causes distortion. Turn down the amp level or source volume.
Crestron Touchpanel Issues
The panel is blank...
1) Check the connectivity: If you panel is wired, verify all connections are connected at the base or bottom of your touch panel and that also the cables are connected in the proper ports at the table or in the floor.
If your panel is wireless, re-dock the panel and make sure to seat it properly. You should see a charging light when the panel is properly seated. Also, if your panel is wireless, removing the battery for 15-20 seconds and then rebooting the panel will sometimes bring it out of a locked-up state. If this fails to restart your system to a responsive mode please contact your applicable support staff or InfoCor to report issues with your system.
The panel doesn't respond to touch...
1) Perform a hard reboot: You will notice two small holes on the front of your Crestron processor in the rack or cabinet area. The one labeled HW-R performs a hardware reset (reboots the control system). The SW-R button performs a software reset (restarts the SIMPL program). Use a small pencil/pen or screwdriver to lightly press and hold the indented HW-R button for 5 seconds, next, repeat with the SW-R button. If this fails to restart your system to a responsive mode please contact your applicable support staff or InfoCor to report issues with your system.
2) Check WAN access point: If your touchpanel is a WIFI panel, you should verify that it is connecting to the wireless access point.
Devices are not being controlled by the Crestron...
1) Check the device power. Open the rack or cabinet area and verify that power is turned to the on position for the applicable device. After power outages, it is a common occurrence for the rack to be powered on, but the individual VCR/DVD, Polycom, or Cable/Satellite box to still be powered down.
2) Check the IR emitter connection. Verify the teardrop-shaped IR emitter is pressed firmly to the front of the unit over the glassy area where you would normally point the remote at to control the device. If this fails to restart your system to a responsive mode please contact your applicable support staff or InfoCor to report issues with your system.
The battery life on a wireless touchpanel is short...
1) Perform battery best practices. After a period of time the batteries in all wireless devices will lose their ability to hold a charge and will not have the ability to run a meeting for 7 – 8 hours a day as they did when they were new.
To get the best battery life, make sure that you are using your wireless unit off the base as much as possible (until the unit is showing low battery strength) and then put it back on the charger to recharge the battery to full life.
2) Use recommended energy saving modes on the touchpanel. Touch Panel brightness: 50% - 80%, Standby Timer: 1-2 minutes, Shut-off Timer: 2-5 minutes. However, touch panel settings are only a small part of the scenario. The antennae which transmit and receive the information to / from the touch panel and the processor depends on how many different commands the touch receives from the user. The more often the touch panel is used while off the docking station, then the more the more the antennae are used; thereby draining the battery. This can drastically affect the length of a charge.
3) Crestron engineering notes the following: Battery life cycle - Crestron 8X and 10X touch panels utilize a lithium-ion battery, such as what you would find in a laptop or a cell phone. In most cases, customers can expect approximately 60 minutes of continuous use per charge with energy saving settings.
Crestron Engineering explains the life cycle of their touch panel batteries as thus:
• Each battery maintains its full life for approximately 300 - 500 cycles. A cycle is defined as whenever a touch panel is placed on the docking station or base and begins to charge.
• After 300 - 500 cycles, the battery life goes from 100% to approximately 80%.
• After 1200 - 1500 cycles, the battery life goes from 64% to approximately 51%.
• This continues until ultimately the battery dies and needs to be replaced.
• Crestron recommends that users should utilize as much of the battery charge as possible before returning it to the docking station. As a best practice for optimal battery life, InfoCor recommends that customers should not return their touch panels to the docking station until 15% or less of the battery remains.
Once a touch panel is returned to the docking station, the touch panel battery is disabled and is charged until it reaches 100%. Once the battery reaches 100%, the charging mechanism is turned off. As long as the touch panel remains on the base, it draws power directly from the docking station and does not reactivate the battery until it is removed from the docking station.
If your organization needs more of a charge out of your TPMC-8X touch panel than what the average expectancy is at optimal settings, Crestron has extended battery options as an add-on solution. Please contact your Account Manager or the Service Department at InfoCor for more information. Unfortunately, this solution is not currently offered for the TPMC-10X series.
If you would like to replace your Crestron TPMC-8X or TPMC-10X battery, please contact the InfoCor Service Department or your Account Manager for more information.
Audio Conferencing Issues
The other party in the audio conference cannot be heard...
1) Verify the room audio system is on. Check the amplifier power in the rack and also check its volume level. It is best to set to about 5 on the main output or ½ way turned to full is usually normal setting
2) Check the incoming caller volume level. For Crestron controlled rooms see the InfoCor-provided user guide for your room on where to adjust these levels.
3) Make sure the other party's microphones are not muted Sometimes the other party might be the cause for the issue you are incurring.
The other party in the audio conference cannot hear me...
1) Check your mute status. Make sure your microphones are not muted or set to privacy mode.
2) Verify your send volumes are appropriate. On Crestron touchpanels this feature is on the Admin page indicated by Telco Transmit (Tx) or Audio Conf send.
The quality in an audio conference is poor...
1) If you hear yourself back in the room the problem is with the echo-cancelling of the other party's audio conference unit. A temporary solution to offer is have the other party turn the volume in their room down and the issue should go away.
2) If you hear feedback (high-pitched noise, getting progressively louder) make sure microphones are not positioned too close to speakers. Turn the speaker volume down
Video Conferencing Issues
The other party in the video conference cannot be heard...
1) Verify the room audio system is on. Check the amplifier power in the rack and also check its volume level. It is best to set to about 5 on the main output or ½ way turned to full is usually normal setting
2) Check the incoming caller volume level. For Crestron controlled rooms see the InfoCor-provided user guide for your room on where to adjust these levels.
3) Make sure the other party's microphones are not muted Sometimes the other party might be the cause for the issue you are incurring.
The other party in the video conference cannot hear me...
1) Check your mute status. Make sure your microphones are not muted or set to privacy mode.
2) Verify your send volumes are appropriate. On Crestron touchpanels this feature is on the Admin page indicated by Vcon Transmit (Tx) or Video Conf send.
The image in the video conference is blocky, freezes, or is a blue screen...
1) Check the camera. If you see the main Polycom screen, but still have a blue image from the camera. You can try “waking up” the camera by pressing the related button on the remote or pressing the corresponding button on the Crestron panel. If the camera still does not respond, you can remove power from the back of the Polycom Eagle Eye camera’s for 15-20 secs and then reinstate the power back to the receptacle, this should fix the camera issue.
2) Check with your network team about bandwidth. The most common reasons for poor video quality are limited bandwidth and improper network configuration. See your network administrator. InfoCor can also escalate your issues to a Polycom network engineer, if necessary.