I posted this on raspberrypi.org on July 8,2018 and got 62 views but no replies. I was hoping someone would have some ideas why the pi is dead and maybe how to remove the heatsink/fan module.
I set up a Pi 3B+ as a router back in March 2018. I had same setup on a Pi3B that was running fine for 2 plus years with no issues and only heatsinks. Well I decided to switch the micro card to the 3B+ but of course it did not boot since the OS was not compatible.
So I flashed the newest of Raspbian , installed the code and changes for the router config and the new 3B+ was working fine. I didn't have any overheating issues but decided to put on the new dual fan system from Iuniker made for the 3B+.
This worked for I guess about 2 weeks and I went to upgrade my Pi's last week. (I have many small projects on Pi Zero, pi Zero W, Pi3B and this new Pi3B+) and could not SSH or VNC into the 3B+. So I checked on it and the only light that was on was the Red led and the fan was still running. No green activity light and the ethernet lights were not flashing.
I found it strange the Pi was not running but the fan was. I unplugged the pi. Waited a minute and plugged the power back in. Only the Red led came on and the fan.
The green light didn't even flash once. So I tried everything. Unplugged the fan. A power supply (I uses 5V with 2.5 or 3 amps) I know is working from another Pi3B. I replaced the card with a fresh image of the OS. Still nothing. I have another Pi3B+. I took the card and power supply from the bad one and put it in the new one and all is ok and working on the 2nd 3B+.
So is my 3B+ fried? Why does the fan come on and nothing else? How do I check? Also do I return the unit to Microcenter where I purchased it? How do I remove the fan/heatsink? Could that have caused issues? If It shorted I would think it would not take over 2 weeks to stop working.
I'm also worried if I put the dual/fan on my newest 3B+ it may cause the same issues.
I also saw someone on youtube who said to pull and reseat the connector above the sdcard as that has cause him issues in the past. But it didn't fix the problem.
Any help would be appretiated.