If the producer of the video linked below is to be believed then this video is confirmation that Siglent or one of its distributors are knowingly and actively distributing problematic oscilloscopes. The fellow in the video states that he purchased this particular scope at a reduced price from Siglent after they declared that it had a known repairable problem.
He states that he wrote several companies looking for second hand units, demos, etc. and Siglent replied that they had this one which was a former lab unit. The way he describes it, they did not inform him of the issue, and apparently did not add the capacitors before sending it out to him from, presumably, the factory.
For fellow member StillTrying's sake and sanity it is about time and good to hear that Siglent are finally going to address the outstanding firmware issues with the still current CML+ series. I seriously ask, does Siglent have a disgruntled employee or saboteur in its midst ?, no company I ever knew fucked things up so badly or on such a regular basis, I feel sorry for their good agents and distributors who once again have to tolerate this crap.
Outside of this forum, just what percentage of USA buyers have recognized an issue with any of the products and are contacting their dealer/distributor/the factory for repair/replacement? My guess is that the percentage is quite small. I suspect that Siglent USA has made a calculated cost/benefiit decision to arrive at their current position.
Let's face it, a lab is not going to be considering Siglent for their test equipment line up. If I were outfitting a lab to set up a repair business I would be looking at Tektronix and comparable OEMs. Siglent is clearly aiming at the hobbyist/student/part time repair shop market where Tektronix reputation is not the first consideration in the purchase. In this forum this issue is getting quite a bit of attention but outside of forum members posting reviews on Amazon, this issue is unknown. I know because even in my searches a few weeks ago this thread did not come up. Five star reviews are still being posted on Amazon indicating satisfaction. I would have posted a five star review up until February 11. So let's not think this issue will actually harm Siglent in any appreciable way.
Fact is that I had not heard of Siglent in amateur radio circles, which is somewhat surprising or maybe I just wasn't paying attention, and only discovered them via an Amazon search for DSOs. I watched several of Dave's videos regarding Siglent products and my impression was that for the money it is a good product especially for its targeted market segment. I'm going to continue to work toward getting a BB 'scope no matter how long it takes as I really like the feature set and small footprint for the occasional work on amateur radio transceivers I want to do.
As Amazon is the most visible venue for reviews of the product, in the USA at least, so long as the review percentage remains high, Siglent USA will continue to let the BA stock move out the door as the few returns and complaints will cost them little. It stinks to be sure, but is the way of the modern business model in the USA.
Note, this is not to defend Siglent USA but to explain what I see going on knowing the corporate world as I do. If I get a BB unit, I will likely adjust my review to four or five stars.