Question about IOGear GCS634U KVM Switch

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Have a GCS634U KVM that keeps failing to switch. acts like it lost the keyboard

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This GCS634U was designed to work with USB keyboards and mice.

First, you need to make sure that your using a direct USB keyboard (no PS/2 to USB adapter).

Second, connect the keyboard directly to the computer and make sure that it's working correctly.

Third, check the connection between the KVM switch and the computers. Try to connect the USB cables of your KVM into different USB ports of the computers.

Last, try to use different USB keyboard to see if the issue is the KVM or the keyboard.

Try to power cycle the KVM switch. Disconnect the KVM from the computers and make sure that there's no even one cable connected to the computers.

Leave the KVM switch disconnected for 10 minutes, then plug it back in. Reboot one computer first and wait until it's fully rebooted. Turn on the second one untill all computers are fully booted up.

If same problem occur, then you need to contact IOGEAR and have them RMA the device.

Thank you and good luck!

Posted on Apr 30, 2010

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1 Answer

Toggle keys don't work as advertised


Hi David,

I located and downloaded a copy of the manual and found the details for [Scroll Lock] [Scroll Lock] [Enter] on page 8 that simply says:

"This will switch everything (KVM and sound) to the next port."

There is no mention of this keystroke switching to the next port "only if there is a computer connected" as you indicated in your question. It would seem to me that if the KVM switches to the next port when it receives the [Scroll Lock] [Scroll Lock] [Enter] keystroke - it is working as described in the manual that I downloaded from the IOGear site.

The only remaining commands accepted by the KVM are :

[Scroll Lock] [Scroll Lock] [a] [Enter] which is a 5 second Auto Scan mode

and:

[Scroll Lock] [Scroll Lock] [a] [n] [Enter] which is nearly identical as the a5 second Auto Scan mode - except the the numerical value you type in place of [n] is the number of seconds spent on the next port.

Double check your manual and if you're still having trouble - contact IOGear directly below:

Toll Free 866-9-IOGEAR (USA)
Phone: 949-453-8782
19641 Da Vinci, Foothill Ranch, CA92610
www.iogear.com
support@iogear.com

Good luck!

Dec 16, 2013 | IOGear GCS634U KVM Switch

1 Answer

I have been using my Iogear kvm switch for almost 2 years now to switch between a desktop and a laptop, both Windows XP. I unplugged the laptop in a hurry to go do a presentation, and plugged everything...


This almost sounds like the display setting on your laptop was changed to an external device. Most laptops are designed to be hooked up to an external display, such as a monitor or projector, specifically for presentations. You can alternate the display options in the following ways:

  1. Laptop display only
  2. External display only
  3. Laptop+External clone
  4. Laptop display + extended desktop on external display (dual monitor setup)
Check your laptop display settings and make sure that it's not in presentation mode (options 2-4) before connecting the KVM switch to it. It may be recognizing the KVM switch as an external display in option 4 mode.

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This worked great for a couple of months and now


It may be possible that the KVM has gone bad. Make sure the keyboard is plugged into the keyboard port of the KVM as this is the only port on the KVM that will recognize the hot key commands. If you have ensured the keyboard is plugged into the keyboard port and you have tried multiple keyboard and still experience problems I would assume the KVM is having problems. IOGear KVMs have a three year warranty and their support can be reached by email support@iogear.com.

Jul 26, 2010 | IOGear GCS634U KVM Switch

1 Answer

Usb mouse and keyboard no longer work; monitor does


if they are wireless it might be a driver problem but if there just usb then the mother board might have failed. are you getting keyboard not detected errors.

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1 Answer

IOgear KVM not working with laptop


First, you have to make sure that the KVM switch is directly connected to your laptop, and NOT to a docking station.

This KVM switch is designed to work with direct connections to the computers.

Second, the light indicator on the KVM switch is not an indicator for power. It's an indicator to see which port is active. If your laptop is connected to port 2, but the focus of the KVM is in port 1, then the port 1 will have a light, not the port 2.

You may also refer to the user manual of the KVM.

Thank you!

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1 Answer

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As a wild guess, it sounds like a static discharge MIGHT be affecting the switcher causing it to crash.

Try increasing your humidity to 40% and grounding yourself before touching the keyboard... This is the season for these static electricity problems... get nipped all the time and you MAY not even feel it to be enough to zap the switch.

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I have a justcom jc102cpa kvm switch and I need the hotkeys


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Note that 'AUDIO' is not part of the "KVM" switching feature.

Dec 11, 2009 | JustCom JC-102CPA KVM Switch

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4-port usb kvw switch #GCS634U


The GCS634U is designed and tested to work only with a standard USB keyboard and mouse. However, most wireless keyboards and mice work with it, but they cannot guarantee any specific model or brand that would work correctly.

As you can see, this KVM switch is a bus powered device (meaning it only gets power from the USB ports of the computers). If the computer cannot provide enough power for the KVM switch to function correctly, then the wireless keyboard will be affected.

You may try using the IOGEAR GKM541RA. It's tested to work with the GCS634U. Or you may also try using a self-powered USB hub (meaning, it has it's own power adapter) and connect it in between the KVM switch and the computer. That self-powered USB hub will be the one that will add up power to the KVM switch and help it to function properly.

Jan 12, 2009 | IOGear GCS634U KVM Switch

2 Answers

Dead


    1. Check your Keyboard-Video-Mouse (KVM) switch. If the system is connected to a monitor, mouse, and keyboard through a Keyboard-Video-Mouse (KVM) switch, or console selector switch, then disconnect the switch and connect monitor, mouse, and keyboard directly to the system. If this solves the issue, please contact your switch manufacturer for support and compatibility on the switch. Some switches can have a firmware update applied to resolve common problems.

      Note: BladeCenter Telco chassis - The KVM module contains keyboard port, mouse port, Power LED, Location LED, Critical Telco Alarm LED, Major Telco Alarm LED, Minor Telco Alarm LED and a video port. The PS2 keyboard and mouse connectors are standard 6-pin Mini Din. The Telco alarms mirror the Telco alarms located on the front panel of the media tray because they use the same signal lines. The KVM module allows the connection of a VGA monitor for system maintenance and control. The video connector is a standard 15-pin VGA. The KVM module is hot-swappable. It is docked into an edge card connector located on the backplane:

      migr_40293_4.jpg

    2. If you have your system daisy chained for KVM capabilities using the C2T port (e.g. xSeries 330),
      then you must flash the C2T firmware after flashing the system BIOS, in order for the mouse and keyboard to work. Otherwise, after a BIOS flash, you will lose keyboard/mouse capabilities unless you walk up to each machine and push the select button.

    • If you are using NetBAY Advanced Connectivity Technology (ACT) CAT5 cabling in your rack server, instead of KVM cabling, click here for ACT information.

    1. Check for POST/startup errors. If you are getting a POST/startup error on the keyboard and/or mouse:

    2. Verify that all items are firmly connected to the correct ports, and that the cables are undamaged with no bent pins. The PS/2 style mouse and keyboard ports look identical, but are not interchangeable. The mouse and keyboard must be attached to the correct ports in order to be recognized by the system and to function correctly.
    3. Swap each item for known good units. If a new item works where the original did not, then the original component must be faulty.

    4. If the keyboard works during the POST/BIOS screens, but not in the operating system, check software logs for device driver errors. Contact your software vendor for more support in configuring the I/O devices.

    5. Check the F1 Setup error logs for system component failures or errors. These are found under Event/Error Logs. Troubleshoot suspect components further to determine if the hardware is faulty. If an IBM component is determined to be faulty, please contact your local IBM Support Center for warranty replacement of the part(s). Please have the Field Replacement Unit (FRU) / Customer Replacement Unit (CRU) part number and Machine Type, model and serial number ready.

    1. Run hardware diagnostics. Replace any parts found defective.

    1. fw.gif
    Download the latest diagnostics for your system
    1. If you can down the system, check the keyboard cable connector on the system unit for proper voltage.

    2. Power off the system.
    3. Disconect the keyboard cable form the system unit.
    4. Power on the system and check the keyboard cable connector on the system unit for the voltages shown:

      PIN Voltage (Vdc) 1 +5.0 2 Not used 3 Ground 4 +5.0 5 +5.0 6 Not used
    5. If the voltages are not correct, replace the system board. Otherwise, replace the keyboard.

    6. If these steps have not solved your problem:
    7. musekye318@yahoo.com

    Jun 30, 2008 | IBM NetVista PC Desktop

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