Connected the generator output probe to 12VDC power supply (generator output was not active). There was a bad smell from the scope and power supply entered into short circuit protection. Now scope works partially - both channels are working as usual, but wave generator output and external trigger does not work at all. I rarely use any of them, and scope is long time out of warranty, so the question is, that I believe, this might be a common issue, so maybe anyone have experience in fixing this? is there a circuitry of this scope available?