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Hello! I had a problem with my logic board. So i took it out and send it to repair (it was not possible to send the whole mac). But when i installed the repaired logic board and turn the mac on it only turns on the fan and it makes an strange alarm sound. Here is a video when i turn it on. It is an especific error of something i did wrong? or it could be a lot of things? I’m doing it myself cause where i’m from we don’t have many technical service. Thank Youuuuu https://youtu.be/5kGoBy5BKwM
From your posted video you appear to have a single tone which then repeats every 5 sec’s. This implies there is no RAM installed. Open the RAM slot on the bottom of the system and make sure the modules are the correct type and installed correctly. Reference: About Mac computer startup tonesiMac: Memory specifications and upgrades
