DVI HDMI connections

Is it possible to have both the DVI and HDMI connected at the same time?       If I connect both the desktop will show but no icons. If I disconnect one of the connections then I get the icons to show
Thanks
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Source Control - Selects the video input signal.
 DVI Selects DVI as the video input signal.
 HDMI Selects HDMI as the video input signal.
 VGA Selects VGA as the video input signal. 
Default Source - Selects the default or primary video input signal when the monitor is connected to two active and valid video sources. The monitor will automatically determine the video format. 
Auto Switch Source - Turns the system's automatic video signal input to On or Off.
"Auto Switch Source" is designed to be used when you have multiple sources connected to the monitor and wish to use one of them at a time. Example... you connect a HDTV tuner to HDMI and a computer to DVI. Turn on the computer and the monitor displays the computer output. Turn off the computer and turn on the HDTV tuner and the monitor automatically adjusts and display the tuner output.
If both sources are on the "Default Source" option selects which input to display based on its setting.
"Source Control" is for manually selecting a source.
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    Writable: Yes
    File System: Journaled HFS+
    disk0s3:
    Capacity: 27.63 GB (27,626,639,360 bytes)
    Available: 13.65 GB (13,652,635,648 bytes)
    Writable: Yes
    File System: Journaled HFS+
    USB:
    USB High-Speed Bus:
    Host Controller Location: Built-in USB
    Host Controller Driver: AppleUSBEHCI
    PCI Device ID: 0x2836
    PCI Revision ID: 0x0003
    PCI Vendor ID: 0x8086
    Bus Number: 0xfd
    Built-in iSight:
    Product ID: 0x8502
    Vendor ID: 0x05ac (Apple Inc.)
    Version: 1.45
    Serial Number: 607F59A99AB2811A (03.00)
    Speed: Up to 480 Mb/sec
    Manufacturer: Apple Inc.
    Location ID: 0xfd400000
    Current Available (mA): 500
    Current Required (mA): 500
    USB High-Speed Bus:
    Host Controller Location: Built-in USB
    Host Controller Driver: AppleUSBEHCI
    PCI Device ID: 0x283a
    PCI Revision ID: 0x0003
    PCI Vendor ID: 0x8086
    Bus Number: 0xfa
    USB Bus:
    Host Controller Location: Built-in USB
    Host Controller Driver: AppleUSBUHCI
    PCI Device ID: 0x2835
    PCI Revision ID: 0x0003
    PCI Vendor ID: 0x8086
    Bus Number: 0x3a
    USB Bus:
    Host Controller Location: Built-in USB
    Host Controller Driver: AppleUSBUHCI
    PCI Device ID: 0x2834
    PCI Revision ID: 0x0003
    PCI Vendor ID: 0x8086
    Bus Number: 0x1a
    Bluetooth USB Host Controller:
    Product ID: 0x8205
    Vendor ID: 0x05ac (Apple Inc.)
    Version: 19.65
    Speed: Up to 12 Mb/sec
    Manufacturer: Apple Inc.
    Location ID: 0x1a100000
    Current Available (mA): 500
    Current Required (mA): 0
    USB Bus:
    Host Controller Location: Built-in USB
    Host Controller Driver: AppleUSBUHCI
    PCI Device ID: 0x2830
    PCI Revision ID: 0x0003
    PCI Vendor ID: 0x8086
    Bus Number: 0x1d
    USB Bus:
    Host Controller Location: Built-in USB
    Host Controller Driver: AppleUSBUHCI
    PCI Device ID: 0x2831
    PCI Revision ID: 0x0003
    PCI Vendor ID: 0x8086
    Bus Number: 0x3d
    USB Bus:
    Host Controller Location: Built-in USB
    Host Controller Driver: AppleUSBUHCI
    PCI Device ID: 0x2832
    PCI Revision ID: 0x0003
    PCI Vendor ID: 0x8086
    Bus Number: 0x5d
    Apple Internal Keyboard / Trackpad:
    Product ID: 0x021a
    Vendor ID: 0x05ac (Apple Inc.)
    Version: 0.18
    Speed: Up to 12 Mb/sec
    Manufacturer: Apple Computer
    Location ID: 0x5d200000
    Current Available (mA): 500
    Current Required (mA): 40
    IR Receiver:
    Product ID: 0x8242
    Vendor ID: 0x05ac (Apple Inc.)
    Version: 0.16
    Speed: Up to 1.5 Mb/sec
    Manufacturer: Apple Computer, Inc.
    Location ID: 0x5d100000
    Current Available (mA): 500
    Current Required (mA): 100
    AirPort:
    Software Versions:
    Menu Extra: 6.2.1 (621.1)
    configd plug-in: 6.2 (620.15.1)
    System Profiler: 6.0 (600.9)
    Network Preference: 6.2.1 (621.1)
    AirPort Utility: 5.5.1 (551.19)
    IO80211 Family: 3.1 (310.6)
    Interfaces:
    en1:
    Card Type: AirPort Extreme (0x168C, 0x87)
    Firmware Version: Atheros 5416: 2.0.19.10
    Locale: FCC
    Country Code: US
    Supported PHY Modes: 802.11 a/b/g/n
    Supported Channels: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 36, 40, 44, 48, 52, 56, 60, 64, 149, 153, 157, 161, 165
    Status: Connected

    Problems like that are caused by stray magnetism that cause misalignment of the electron beams from landing on the proper phosphor color. The set itself has a demagnetizer, but sometimes the magnetism is too strong for the built-in demagnetizer to overcome. But calling in a TV repair person to do a demagnetization is, I'm afraid, a throw back to bygone days. But that's what your TV needs.

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