Trackpad/keyboard not working - Replacing the trackpad cable may resolve this issue.Random shut downs - After ruling out obvious issues (liquid/RAM/battery), repairing the logic board resolves the issue.You must rule out liquid/bad RAM/software issues/battery, etc. im thinking of replacing it with an i5 or i7 - but. but on a Intel Core i3 4130 which leaves a lot to desire in terms of performance. This requires logic board replacement or possible repair if approved. I recently brought an iMac 27' 14,2 back to life after a CPU fault (which in itself was odd since I never seen a PC or Mac with a fried Intel CPU) and it runs pretty nice. Random shutdowns - This is caused by low voltage in one of the cores of the CPU if that core is unstable.Please rule out other issues in order to confirm.) (Note: This is not the ONLY cause for this symptom, just common. Repairing the logic board resolves the issue. Start up issue where fans spin, but display remains black and does not fully boot - This is caused by a power issue with GPU.
#IMAC 27 LATE 2013 PROBLEMS PRO#
Mid 2012 - Early 2013 MacBook Pro retina 15" A1398 Running off of one RAM stick in the good slot or replacing logic board resolves issue. LCD flickering/system freezing - This is due to defective RAM slot.You may need to reinstall the OS after replacing cable. Hard drive cable failure - You may see a very slow, yet healthy drive, CRC errors, failure to complete updates, prohibitory symbol upon start up (circle with slash), or folder with question mark.Run GPU/VST test in order to confirm.)ΔΆ012 MacBook Pro 13" A1278 (non-retina, with optical drive) (These are typical symptoms and not all inclusive. Display shows discoloration or vertical lines throughout.Many of these Macs experience GPU failure which present the following symptoms: - Early 2013 MacBook Pro retina 15" A1398.2 2012 MacBook Pro 13" A1278 (non-retina, with optical drive).