Solo 4K
Last drivers.
Connected together tuner SkyTV VIII dual / tuner Sundtek SkyTV Ultimate IV.
No signal on both tuners.
Remove Sundtek SkyTV Ultimate IV, reboot solo4K, SkyTV VIII dual no signal.
Unplug the power adapter SkyTV VIII dual temporarily,load solo4K, SkyTV VIII dual work fine.
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Sundtek I just add the answer here, it must have been fixed for a long time already.