For my model, I had to disconnect from power, remove the battery, and then hold the power button for 10 seconds. Troubleshooting #4: Reset SMC with old parts.
I started up by pressing “D” and did both the short and extended scans.
Troubleshooting #3: Run Apple Diagnostic on Startup. It was back over 6,200 RPM’s in about 30 seconds. I ran a video to tax the CPU, Everything was fine. Launching an app didn’t make things go crazy. Troubleshooting: #2: Removed SSD and RAM and went back to old parts. The bottom felt very uncomfortable to touch with my hand. My thighs were very hot from the bottom of the laptop. I launched Chrome and within 30 seconds I was over 6,200 RPM and the temperatures were nearing 200 F. I waited about 15 minutes and then restarted. Troubleshooting #1: Wait 15 minutes, Restart. And my laptop was on my lap as usual with plenty of ventilation. FYI: The inside temperature in the room was about 60 F. I had to shut down because the fan speed and temperatures were increasing quickly. With no warning, both fans revved up past 6,200 RPM, and the CPU and GPU shot up over 195 F. I was super careful when blowing and didn’t blow that hard. I’m confident no moisture came from my mouth. 
I reconnected the fan connector no problem (6) I gave one blow of air from my mouth to blow some dust away. There wasn’t much dust so I decided to leave the other fan alone. (5) Disconnected one fan because I was curious if any dust was underneath. (2) Disconnected from power source (3) Disconnected the battery (4) Removed RAM and SSD.
SSD DRIVE FOR MACBOOK PRO EARLY 2011 UPGRADE
I just wanted a larger SSD, and I figured why not upgrade from 8 to 16 GB of RAM. I never had any overheating problems and it has always been super cool. Regarding sound and temperature, my computer was always whisper quiet. I was having zero problems with my MacBook Pro. But based on early feedback below, I’m buying it now, and will post the results. I did not buy the Hard Drive/IR Sensor Cable Replacement for the MacBook Pro 15" Unibody Early 2011.
SSD Purchase: Crucial MX500 2TB SATA 2.5" 7mm (with 9.5mm adapter) Internal SSD. RAM Purchase: Crucial 16GB Kit (2 x 8GB) DDR3L-1333 SODIMM Memory for Mac. Direct purchase from I used ’s scanner tool to make sure I purchased the correct parts. MacBook Pro, Early 2011, 15 inch, I7, 2.3GHz (Model Identifier MacBookPro10,1.)
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