Have you tried doing this? Some Samsung TV requires you to change to PC mode before it will recognize a PC signal. Since they are relatively cheap, might want to get a DVI-HDMI adapter and go from the DVI port to HDMI 1 on the TV and see if that works.
Source
When you are watching product and you want to watch a movie on your DVD player or Blu-ray player or switch to your
cable box or STB satellite receiver, you need to change the Source.
TV / Ext. / PC / HDMI1/DVI / HDMI2 / AV / Component
1. Press the SOURCEs button on your remote. The Source screen appears.
2. Select a desired external input source.
✎ Use to select TV or other external input sources such as DVD / Blu-ray players / cable box /
STB satellite receiver connected to the TV.
✎ You can only choose external devices that are connected to the product. In the displayed Source list,
connected inputs are highlighted.
✎ In the Source, TV, Ext. and PC are always stays activated.
How to Use Edit Name
Edit Name lets you associate a device name to an input source. To access Edit Name, open the Tools menu when the
Source list is displayed. The following selections appear under Edit Name:
VCR / DVD / Cable STB / Satellite STB / PVR STB / AV Receiver / Game / Camcorder / PC / DVI PC / DVI Devices / TV
/ IPTV / Blu-ray / HD DVD / DMA: Select an input jack, and then select the name of the device connected to that jack
from the list that appears.
✎ If you connect a PC to the HDMI IN 1 (DVI) port with an HDMI cable, assign PC to HDMI1/DVI in Edit Name.
✎ If you connect a PC to the HDMI IN 1 (DVI) port with an HDMI to DVI cable, assign DVI PC to HDMI1/DVI in Edit
Name.
✎ If you connect an AV device to the HDMI IN 1 (DVI) port with an HDMI to DVI cable, assign DVI Devices to HDMI1/
DVI in Edit Name.