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Discussion Starter · #1 ·
I have a HDMI cable with a displayPort adapter connecting laptop and a Panasonic HDTV. The cable works perfectly with one laptop (IBM Thinkpad with a Radeo Mobile Video card) by displaying videos/screens on the TV, however it does not work with an HP Probook 6550b with an Intel HD Graphics and displayPort as well. The HP does not see the HDMI connection at all. I did notice a flashing laptop screen when I was connecting/disconnecting the cable from the laptop, meaning it was able to detect something.

I have tried to google for all possibilities but failed to find any answers and hope experts at this forum could shed some lights on the issue.

Thanks a lot.
 

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If it works fine with the Radeon machine then it's likely a problem with the Intel graphics. The flashing you see on the laptop screen just means it's doing detection but doesn't necessarily mean it's found anything on the displayport output. I'd put in a call to HP and explain it to them. Make a point that another laptop with a different GPU works fine. This will discount them saying it's your adapter cable.
 

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Have you checked that the monitor is enabled after you plug in the cable, and it « detects » it? You should check that your driver is up-to-date, that both in the Intel HD Graphics properties and in the Windows Display properties panels, the TV is enabled.

And have you tried rebooting? Often it solves a few problems.
 

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Try checking the HP website to ensure you have the latest BIOS for the laptop and newest video drivers. If HP's released Intel HD Video driver doesn't do it, goto, intel.com -> support -> Select the Video chipset and DL the generic driver.
 

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I would not recommend installing a generic driver on a laptop. There are too many potential customizations that happen for the specific machine. If you don't care about power consumption or odd bugs here and there then try the generic driver (if it even installs).
 
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