Hi guys.
I bought a TDA7293 board (thought its not assembled, well thought bad... next time
) made a quick ghetto amplifier for a bass speaker to have a 2.1 sound system. (Btw. connected from stereo to mono with just 8ohm resistor at each end conected together for the speaker. Sorry, will be changing them for 100ohm. Im still learning.
)
Well, once I connected a VGA display through HDMI to VGI connector, I heard strong 50Hz huss from the speaker and now I have HDMI free laptop.
(Took me a while to get through that one... I probably wont have such expensive laptop ever again )
I managed to get external display back with USB3 to VGA adapter and now.. Guess what. Did I change, repair, stop using the deadly amplifier ? Your correct. The USB3 to VGA adapter is dead as well.
Now... I will have to take a look at the amp input with my osciloscope yet, weather I see anything dangerous anywhere but so far, can you tell me anything other than that Im stupid out of my stories ? Where to look for a fault, what to expect, maybe cheer me up by saying its probably just a fuse on main board near HDMI Chip and it can be repaired ?
Hope you laughed a bit at my story. Its at my cost anyways.
I have really no idea what could caused both HDMI and USB3 interferance. Of course, no other accessories such as Mouse or USB stick were interfiered. The amp is working just fine all the other time. Thank you all for understanding and help.
You rock, guys !
* When the amp is connected, but turned off, there was no interferance. Just remembered.