4.0 GHz i7-6700K Logic Board for 27″ iMac A1419 Late 2015 R9 M390 2GB 661-03172
The 4.0 GHz i7-6700K Logic Board for 27″ iMac A1419 Late 2015 R9 M390 2GB 661-03172 is a replacement logic board specifically designed for the Late 2015 27-inch iMac. Equipped with the powerful 4.0 GHz Intel Core i7-6700K processor and the AMD Radeon R9 M390 2GB graphics card, this logic board controls the core functions of your iMac, including processing, graphics, power, and connectivity. If your iMac is experiencing critical failures, replacing the logic board will restore its full functionality.
Related Part Numbers
- Apple Part Number : 661-03172
- Printed Part Number : 820-00134-A
Compatibility
- iMac 27″ A1419
- iMac17,1 Retina 5K Late 2015: MK462LL/A (3.2 GHz Core i5)
- iMac17,1 Retina 5K Late 2015: MK482LL/A (3.3 GHz Core i5)
- iMac17,1 Retina 5K Late 2015: BTO/CTO (4.0 GHz Core i7)
Condition
- Open Box
- Replacement Part Fully Tested
- Passed All Quality Inspections
- High-Quality Replacement Part
Compatibility Agreement
Why Replace the 4.0 GHz i7-6700K Logic Board For 27″ iMac A1419 Late 2015 R9 M390 2GB 661-03172
- Complete System Failure: If your iMac does not power on at all or gets stuck on the Apple logo during boot, the logic board may be the issue. It controls the startup process, and a failure in this component will prevent your system from functioning.
- Frequent Crashes or Freezing: If your iMac crashes unexpectedly, freezes during operation, or displays error messages repeatedly, the logic board could be malfunctioning. Since it handles the communication between different hardware components, a damaged board can cause these instability issues.
- Display Problems (Flickering, Artifacts, or Black Screens): Visual issues like screen flickering, graphical artifacts, or a black screen are often signs of a malfunctioning GPU (the AMD R9 M390 2GB). This GPU is part of the logic board, and replacing it will fix display-related problems.
- Power and Overheating Issues: If your iMac is overheating, shutting down unexpectedly, or failing to charge properly, the logic board might be failing to manage power and thermal regulation. A new logic board will restore proper power distribution and temperature control.
- Peripheral Device Failures: If USB, Thunderbolt, or other ports stop working or become unreliable, this can point to a malfunctioning logic board. The logic board controls these connections, and replacing it will restore proper functionality to all your peripheral devices.
Signs That Replacement is Needed for 4.0 GHz i7-6700K Logic Board For 27″ iMac A1419 Late 2015 R9 M390 2GB 661-03172
- No Power or Boot-Up: If iMac fails to turn on or gets stuck on the Apple logo screen during startup, the logic board may not be properly initiating the boot process, which requires replacement.
- Frequent Crashes or System Freezing: If your iMac crashes frequently, freezes without warning, or throws system errors that you can’t resolve, this could be a sign that the logic board is causing instability within the system.
- Graphics Issues (Artifacts, Flickering, or Black Screen): If you experience graphical problems such as screen flickering, visual artifacts, or a blank screen, the R9 M390 2GB GPU integrated into the logic board may be failing, requiring replacement of the entire logic board.
- Overheating or Unpredictable Shutdowns: If your iMac overheats, shuts down randomly, or is running slower than usual, it might be due to power or thermal management problems caused by a faulty logic board. Replacing it will restore proper power and cooling control.
- Malfunctioning USB, Thunderbolt, or Other Ports: If your iMac’s USB, Thunderbolt, or other peripheral ports are intermittently working or completely dead, the issue may lie with the logic board, which controls the communication with these devices. A new board will fix connectivity issues.
- Unresponsive Keyboard or Mouse: If your iMac’s keyboard or mouse are intermittently unresponsive or completely stop working, it could be an indication that the logic board is failing to communicate with input devices, signaling the need for replacement.
Important Notes
- Professional Repairs: It’s recommended to have this repair done by a qualified technician, especially if you don’t have experience with Consumer Electronics/gadget disassembly.
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⚠️ Warning: You Must Backup Your Data Before Repair Process ⚠️
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