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<blockquote data-quote="damaster" data-source="post: 476220" data-attributes="member: 60795">Do this test please: - Get AVS HD 709 1.3 test patterns MP4 version and AVCHD or PATCHED version: AVS HD 709 - Blu-ray, HD DVD, &amp; MP4 Calibration - AVS Forum- We'll only be using the &quot;Basic Settings&quot; title, first chapter. It's the Black Clipping Pattern, a very low APL pattern for observing black-level on a digital display.- For this test turn your TV's brightness up all the way because we are really just trying to determine what output levels we're getting out of the HTPC. You can set it back to the calibrated level once we're done.- Run the MP4 version of the Black Clipping Pattern in MPC-HC, note the flashing bars you are able see.- Run the AVCHD/PATCHED version of the Black Clipping Pattern in PowerDVD (mount or burn the ISO first), again note the flashing bars you are able see.- Run the MP4 version of the Black Clipping Pattern in MediaPortal, again note the flashing bars you are able see.Please post here the flashing bars you were able to see in each of the scenarios above.So this proves it's a problem with the Radeon HD 4670!&nbsp; My Radeon HD 2600 Pro and Radeon HD 3470 both work perfectly fine.&nbsp; Also, I set up my brother's HTPC which uses an onboard Radeon HD 3200 GPU and that also works just fine in and out of MediaPortal.&nbsp; I'm not sure why crazyfool is having black level issues with his 3200 though.</blockquote>

[QUOTE="damaster, post: 476220, member: 60795"] Do this test please: - Get AVS HD 709 1.3 test patterns MP4 version and AVCHD or PATCHED version: AVS HD 709 - Blu-ray, HD DVD, & MP4 Calibration - AVS Forum - We'll only be using the "Basic Settings" title, first chapter. It's the Black Clipping Pattern, a very low APL pattern for observing black-level on a digital display. - For this test turn your TV's brightness up all the way because we are really just trying to determine what output levels we're getting out of the HTPC. You can set it back to the calibrated level once we're done. - Run the MP4 version of the Black Clipping Pattern in MPC-HC, note the flashing bars you are able see. - Run the AVCHD/PATCHED version of the Black Clipping Pattern in PowerDVD (mount or burn the ISO first), again note the flashing bars you are able see. - Run the MP4 version of the Black Clipping Pattern in MediaPortal, again note the flashing bars you are able see. Please post here the flashing bars you were able to see in each of the scenarios above. So this proves it's a problem with the Radeon HD 4670! My Radeon HD 2600 Pro and Radeon HD 3470 both work perfectly fine. Also, I set up my brother's HTPC which uses an onboard Radeon HD 3200 GPU and that also works just fine in and out of MediaPortal. I'm not sure why crazyfool is having black level issues with his 3200 though. [/QUOTE]

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