The following topics are covered in this chapter.
This section provides some troubleshooting tips.
In addition, the Troubleshooting chapter in your O2 Workstation Owner's Guide provides troubleshooting tips for the O2 workstation.
If you're encountering problems with the monitors, first check that the board shows up in the hardware inventory. Open a UNIX shell. At the prompt, enter
hinv
Look for the following line describing the board you installed:
Dual Channel Display
The suggestions in Table 4-1 may help you isolate the problem.
Table 4-1. Troubleshooting Tips
Symptom | Possible Cause |
|---|---|
Dual channel display board does not show up in hinv. | The board is either not installed correctly, or is faulty. Go over the installation steps again, making sure you press the board all the way in. You should hear a click as it is seated. If reseating the board doesn't solve the problem, the board may be faulty. Call your service representative. |
Same image appears on both monitors | Dual channel display software patches are not installed or timing mode is set to single channel. See “Installing the Dual Channel Display Option Board”. |
Monitors display a black or very dark image | Monitors do not recognize the video black level because dual channel display software patches are not installed. See “Installing the Dual Channel Display Option Board”. Or board may be faulty. |
Only one monitor is connected to the main video connector on the system board, and no image is displayed. | The dual channel display display settings may be enabled. To disable them, see “Enabling and Disabling Dual Channel Mode”. |
Primary monitor is blank and secondary monitor displays correct image. | The primary monitor may be connected to the main video connector on the system board, instead of to the dual channel display board. Check that both monitors are connected to the dual channel display board. See “Connecting the Monitor Cables to the O2 Workstation”. |
One monitor displays the image correctly, but the other monitor's image is frozen. | The board is probably faulty. Call your service representative. |
The images on both monitors alternate between the correct image and noise, a constant color, or a badly flickering image. | The board is probably faulty. Call your service representative. |
Xscreen dual channel display timing tables are not displayed. | The dual channel display software patches are not installed. See “Installing the Dual Channel Display Option Board”. |
Some windows appear to overlap, with part of the window on top of one monitor, and part of the window on the bottom of the other monitor. | You may need to modify your application's resources or manually move the popup window. See “Resetting Window Positions”. |
The O2 workstation is designed so that you may maintain and repair the workstation without the help of a trained technician. Contact your Silicon Graphics subsidiary or authorized distributor for information about product support.
Silicon Graphics, Inc., provides a comprehensive range of product support for its products. If you are in North America and would like support for your Silicon Graphics supported products, contact the Technical Assistance Center at 1-800-800-4SGI or your authorized service provider. If you are outside North America, contact the Silicon Graphics subsidiary or authorized distributor in your country.
To return any part, use the packaging materials and box that came with your replacement part. For product support information, see the section, “Product Support.”
Table 4-2 shows the cable pinout assignments for both DSUB15 connectors on the dual channel display board. The pinouts are the same as the main video connector pinouts on the system board.
Table 4-2. Dual Channel Display Pinout Assignments
Pin | Assignment |
|---|---|
1 | RED |
2 | GREEN (with composite sync) |
3 | BLUE |
4 | RESERVED |
5 | GROUND |
6 | RED RETURN |
7 | GREEN RETURN |
8 | BLUE RETURN |
9 | +5V, limited current |
10 | GROUND |
11 | RESERVED |
12 | DDC DATA |
13 | HORIZONTAL SYNC (Not Active) |
14 | VERTICAL SYNC (Not Active) |
15 | DDC CLOCK |
 | Caution: This device has several governmental and third-party approvals, licenses, and permits. Do not modify this product in any way that is not expressly approved by Silicon Graphics. If you do, you may lose these approvals and your governmental agency authority to operate this device. |
 | Note: If you received a system upgrade label, tilt the O2 carefully and place it underneath the chassis. Do not cover the original label. |
The device conforms to several national and international specifications and European Directives listed on the Manufacturer's Declaration of Conformity. The CE insignia displayed on each device is an indication of conformity to the European requirements.
Table 4-3. Class A FCC Declaration of Conformance
Trade Name | Silicon Graphics, Inc. |
Product | O2 Dual Channel Display Option |
Model Number | CMNB014A |
Date of Conformance | April 1998 |
Responsible Party | Silicon Graphics, Inc. |
Address | 2011 North Shoreline Boulevard, |
Telephone | (650) 933-1071 |
This equipment complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
| Caution: The user is cautioned that changes or modifications to the equipment not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. |
The following information applies to the system base configuration. Refer to the Manufacturer's Declaration of Conformity for your system's specific classification.
This device complies with the Class A limits of Part 15 of the FCC Rules. Operation is subject to the following two conditions:
This device may not cause harmful interference.
This device must accept any interference received, including interference that may cause undesired operation.
This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.
Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.
This device complies with Class A electromagnetic emissions limits of C.I.S.P.R. Publication 22, Limits and Methods of Measurement of Radio Interference Characteristics of Information Technology Equipment; Class A limits for Information Technology Equipment; and Japan's VCCI Class A limits.
The equipment described in this guide generates and uses radio frequency energy. If it is not installed and used in accordance with the instructions in this guide, it can cause radio and television interference.
This equipment has been tested and complies with the limits for a Class A computing device in accordance with the specifications in Part 15 of FCC rules. These specifications are designed to provide reasonable protection against such interference in an industrial or office installation. However, there is no guarantee that the interference will not occur in a particular installation. This system is not certified for home use.
You can determine whether your system is causing interference by turning it off. If the interference stops, it was probably caused by the workstation or one of the peripherals. To tell if the interference is caused by one of the peripherals, try disconnecting one peripheral at a time to see if the interference stops. If it does, that peripheral is the cause of the interference.
If your workstation does cause interference to radio or television reception, try to correct the interference by using one or more of the following suggestions:
Turn the television or radio antenna until the interference stops.
Move the workstation to one side or the other of the radio or television.
Move the workstation farther away from the radio or television.
Plug the workstation into an outlet that is on a different circuit from the radio or television. (That is, make certain the workstation and the radio or television are on circuits controlled by different circuit breakers or fuses.)
For additional information, check the FCC web site at
http://www.fcc.gov/Bureaus/Compliance/WWW/tribook.html
The device is FCC-compliant under test conditions that include the use of shielded cables between the workstation and its peripherals. Your workstation and any peripherals you purchase from Silicon Graphics have shielded cables. Shielded cables reduce the possibility of interference with radio, television, and other devices. If you use any cables that are not from Silicon Graphics, make sure they are shielded. Telephone cables do not need to be shielded.
Silicon Graphics designs and tests its products to be immune to the effects of electrostatic discharge (ESD). ESD is a source of electromagnetic interference and can cause problems ranging from data errors and lockups to permanent component damage.
It is important that while you are operating your workstation you keep all the covers and doors, including the plastics, in place. The shielded cables that came with the workstation and its peripherals should be installed correctly, with all thumbscrews fastened securely.
An ESD wrist strap is included with some products, such as memory and graphics upgrades. The wrist strap is used when installing these upgrades to prevent the flow of static electricity, and it should protect your system from ESD damage.