The SSD is definitely soldered in on these -- it cannot be removed/replaced/upgraded. There is no mention in the service manual of removing the fan -- but there is a part for sale on EBay: [URL] You'll probably have to look inside the system to see what is involved in replacing the fan separately from the system board -- it probably isn't soldered but it may be glued in place. Since the mainboard assembly is around $600 or more, the fan replacement is the less expensive option.  You may want to contact parts-people.com -- they are experts with Dell parts and may be able to answer definitively as to whether it's feasible to replace the fan assembly separately.  
I had an XPS 13 7390 2-in-1 in for repair about 6 months ago after it made a loud screeching noise and came up with the Error Message 511, Fan is not responding. I tried sourcing a replacement fan, but was out of luck, so thoroughly cleaned it and returned it to the owner who has had no problems from then until now, when it's done the exact same thing.I don't have the device with me, but I seem to recall doing some research and was advised that the Video Fan is an integral part of the Motherboard, and I have also seen today that the SSD is soldered to the Motherboard, is one or both of these correct ?Once again, I can't find a replacement Video Fan, though I may of course be looking in the wrong places, but I have found a Motherboard for sale, though that definitely doesn't have a Video Fan attached to it ... can anybody advise me, please ?1) Can I get the Fan separately ?2) Is it advisable / safe to take the current fan off of the Motherboard if I can, I seem to recall it was VERY well connected ?3) Should I be looking for a Motherboard & Fan combination ?4) Whichever I buy, where would you suggest I look (I am in the UK) ? Thanks in advance ... 
Replacement Video Fan or possibly Motherboard for XPS 13 7390 2-in-1