The white box. I took a set of bias shots to find my gain/offset settings. Got that and set it doing a 5 minute dark and that killed it. They replaced it pretty quick but it just shows the quality control. And all the cables that come with it are crap as well. I bet you thought this was a quality product
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gain/offset settings :-
http://www.lightstorm.at/pdfs/QHY8_settings.pdf
I find gain zero for bright objects and gain 50 for dim objects works for me. I use maxim.