Apple told my wife this iMac was “Unfixable“...did they LIE???

2011 iMac with an AMD Radeon GPU, Intel i7 Quad Core. It overheats and shuts itself down after being on for a minute. Then it goes into a never-ending boot loop. Furthermore, Apple stopped supporting this model and you can no longer update the iOS. Let’s see if there’s anything we can do to make it a working machine... *SHOW YOUR SUPPORT* 1: Become a Member on Locals: 2: Donate via Paypal: 3: Buy Merch: 4: Send in Viewer Mail. (Contact Me for details at bradlinzy@ ) 5: Purchase an ad! (Rate sheets available upon request at email above.) 6: Buy something from a sponsor and tell them I sent you. 7: Stand in the middle of the street naked screaming “LONG LIVE THE GUITOLOGIST!“ Then when the cops arrive, tell them about my channel. SUBSCRIBE TO CHANNEL 2: ------------------------------------------------------------ ♠STUFF I USE -5A Variac: -Jameco Isolation Transformer: -Fluke 87: -Yotec 936 Soldering Station: -Sealody SSA51 soldering station: -Black and Decker Heat Gun: -Geekcreit® LCR-T4 Mega328 Transistor Tester -HT02 Handheld Infrared Thermal Camera -Solderless Breadboard: -Breadboard Jumper Wires: -Geekcreit® XR2206 Function Signal Generator DIY Kit -Contact Cleaner: -Max Professional Cleaner and Lubricant: -Deoxit Fader Cleaner: ♠RECORDING -JVC Everio Camcorder -Andonstar USB Microscope: -Articulated Boom Arm with Cam Mount: -Shure Beta 87A -EV 635A Omnidirectional Dynamic Mic ♠RECOMMENDED BOOKS -RCA TUBE MANUAL -DESIGN AND CONSTRUCTION OF TUBE AMPLIFIERS: -Designing Tube Preamps for Guitar and Bass: ♠2006 FENDER AMERICAN STD TELECASTER PICKUPS -TV Jones Magnatron Neck: -Seymour Duncan Vintage Stacked Bridge: