Monoprice Select Mini Owners

I was given a non working Mini. Intention is to use .3 or .25 nozzle for tiny projects. I have an Ender5 already. For the life of me I cant figure out how the fan attaches to the hotend. There is a loose spring? Any diagrams out there? I cant locate it. Also no power supply so what am I searching for on Amazon?.

Hey I just got this and unfortunately the z axis won't move up or down. It makes a sound like it's trying, but nothing happens. When I hit home to level it, it came down super slowly. Other axis movements work. It's under warranty, so I can replace or return it, but I won't be able to get it our until Monday. Is there anything I could try? Any tips? Monoprice just told me to return it. That it's most likely a sensor.

I opened the bottom out of curiosity. Everything looked to be in the right place and tight. (I hate returning another 3d printer, after my anycubic came broken. I must be cursed. Lol)

I have purchased a 32 gig micro sd card to use for my prints.
Problem: My laptop shows files that I have added to the card, but when I put it in the printer it says: No files found
Any ideas?

I was printing something over the night but when I woke up the print had just stopped. Ever since then the printer won't read the sd card, won't move in any axis or extrude, and the temperature just reads 0 for the bed and extruder. Any help would be appreciated.

So my mini will reach 60 if I only preheat the bed and nothing else. If I begin to preheat the Hotend, the temperaure begins to fall. I purchased this printer and the heatbed was bad. I prdered a Heatbed via Amazon and did the wire relocation using the printed part. It was working okay, it seemed to heat up slowly, so I did a PID adjustment using the info from Tyler. Well, now it's worse than before and it seems as if though its progressivly getting worse. At first it was just one or two degrees and this is normal for these printers from what I have read. But it's steadily declining. Now my heat bed is set to 60c and it is floating at 47-48. I have opened the printer a few times and inspected visually the connectors and board, no signs of any damages, cold joints, burnt pins, etc... Any more help or advice would be welcome. I have a second heated silicone mat, and the Ramps board to add a second heater to the build plate just because the printer has always been slow to heat up. Fearful to move forward if there could be something else going on. Notable to mention I have two of these MPSM V2 with the most current Firmware. 1 in black and one in white. All of my problems have been with the white printer. Also notable to mention. The black printer from the factory has had the heat bed wires relocated to a newly added cuout in the body. Again, I have replaced the white printers heat bed and re routed the wires so they have no resistance or strain.