Does it feel hot on the bottom? If it doesn’t feel that hot on bottom , then it would be an incorrect temperature sensor. First things first, take a bottle of compressed air, take out the fans, and clean/spray it. There maybe a massive build up of dust causing this, I’ve seen it happen before. Next, assuming that the system isnt that hot, you can control the fans using Mac Fan Control https://crystalidea.com/macs-fan-control I use this application alot personally on my L2013 15” Hope this helps!
First, I’m assuming you mean the Apple SSD It sounds like the newer drive has failed or somehow broke. The older drive works perfectly, so we know its not the Macbook, so we can rule that out. Its most likely a bad drive. Hope this helps!
Yes. Ram is not interchangeable. Find the technical specs for your model of laptop from Dell’s website and find the DDR and the clock speed. For finding the ram you need: You will need to find SO-DIMM (laptop form factor) ram with the same DDR (will be either 3 or 4) and the same clock speed
It is most likely broken - it could be anything from a bad LCD to a loose connector, but in my opinion the iPad 2 is not worth the $ to replace the screen as its quite old, an iPad 3 or 4 would be worth it though
This is a really weird issue - I would check to see if your phone is fully up to date on everything (go to settings and search for Updates), and if it isnt fully updated I would say its worth to try to reset the phone, as it possibly could be something wrong with your install of android
I had this issue with my 2009 macbook pro, to where it was super dim even at full brightness and it did end up being the display, like it had to be replaced. I would def re check all the connections to see if any came loose, and if that doesnt fix it then a screen replacement may be required