Try removing it and then reinstalling it again. Gently push on it to see if it could be loose. To fix this you will need to open your system back up and look at the RAM. This means that when you plugged it in, the contacts on the chips may have been misaligned or loose and they are not making the proper connection. There is a chance you may not have seated it properly. If you have a system with removable RAM and you have recently installed new RAM or for some reason, you removed it and then plugged it back in. In this case, it is unlikely that this is your problem unless you have dropped or jarred your laptop hard enough to knock it loose. Many newer MacBooks have their RAM soldered to the logic board, so you are unable to upgrade, remove or install the RAM yourselves. You can read more about this from Apple Support. Once your system starts back up, the NVRAM/PRAM will be cleared and may fix the problem you are experiencing. Step 2: Turn it back on and immediately press and hold down the Option + Command + P + R keys all at the same time until you hear the startup sound. For ones with an Apple Silicone chip, it is reset automatically every time you reboot and the data is rebuilt on startup. Note: This only works on some MacBook Pros.

Just follow the quick steps below to try it. If so, you may be in luck because a simple reset can often clear up this problem and it is very simple to do. If it has been corrupted, there is a chance it could cause your RAM issue. Sometimes this area of memory can get corrupted.

Non Volatile Random Access Memory ( NVRAM ) or Parameter Memory ( PRAM ) are locations in memory where your Mac stores settings and other important parameters so that it can access them quickly. Not all of them will be a problem with the chips themselves but could be a simple software issue. Now that you know the 3 beeps from your Mac detect a problem with your RAM and you know what RAM is, let’s look at some possible issues and their solutions. MacBook Pro Beeps 3 Times And won’t Turn On: Possible Issues & Solutions

The soldered-in variety has much less of a chance of coming loose but it is also much harder to upgrade or replace them if one or more of them fail. They may also be improperly seated during an upgrade or replacement. Removable RAM can sometimes come loose if the system is jarred. Many newer systems have their chips soldered into the logic board making it much harder to replace or upgrade them.

Macbook pro 3 beeps startup