After about 30 min found the fan running at high speed. I switched off pressing the power button and switched on again. This item may be a floor model or store return that has been used. Kept the option button pressed for sometime and then there were intermittent bips - three at a time+ the fan started running. Apple MacBook Air A1466 20 128GB intel i5 1.6Ghz 8GB RAM AB. In the end put a removable bootable drive and pressed the power switch together with "option" button. I spent several hours on it and there was no success. Tried all possible suggested methods, 10 sec switch off, disconnect battery, disconnect keyboard and reconnecting charger, SMC reset, PRAM resent nothing really worked. A1466 (EMC 2925 MacBookAir7,2) 2.2 GHz MacBook Air 13' Early 2017 A1466 (EMC 3178 MacBookAir7,2) 1.8 GHz A1466 (EMC 3178 MacBookAir7,2) 2.2 GHz MacBook Air 13' Late 2010 A1369 (EMC 2392 MacBookAir3,2) 1.86 GHz A1369 (EMC 2392 MacBookAir3,2) 2.13 GHz MacBook Air 13' Mid 2011 A1369 (EMC 2469 MacBookAir4,2) 1. Expecting some problem I tried to rest it through a reboot commend. Pressed the power on button and it came to life. This newest 13' Air keeps its traditional model number, A1466. One night,a couple of days back, I put it into the sleep mode closing the lid and in the morning I found it totally blank. Tool used on this step: P5 Pentalobe Screwdriver Retina MacBook Pro and Air.
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