So let’s start off with the charger issue, sadly the logic board has become damaged. The charging logic on it has failed likely caused by using a knockoff charger!
● [https://lifehacker.com/dont-replace-your-macbook-charger-with-a-cheap-knockoff-1825605569|Don't Replace Your MacBook Charger With a Cheap Knockoff]
● [https://beetstech.com/blog/oem-magsafe-chargers-vs-counterfeits-teardown-for-truth|OEM MagSafe Chargers vs Cheap Imposters: Teardown for Truth]
● [http://www.righto.com/2016/09/why-you-shouldnt-use-cheap-macbook.html|Lacking safety features, cheap MacBook chargers create big sparks]
● [https://www.youtube.com/watch?v=DrxAuhrrLU4|FAKE Magsafe MacBook Chargers on eBay - Watch before buying a Mac Charger]
Using these knockoff chargers over stresses the charging logic so when the battery gets old can push the system to failure. Often replacing the MOSFET’s can bring the system back to life and using a REAL Apple charger! But you still have to replace your battery as well as its worn out!
-
The next issue here is the 3 beep code that’s a RAM error! Either one of the SO-DIMM’s is bad or the socket connection is failing.
+
The next issue here is the 3 beep code that’s a RAM error! Either one of the SO-DIMM’s is bad or the socket connection is failing [https://support.apple.com/en-us/HT202768|About Mac startup tones]
The last issue is the fan running at high RPM and never starting up fully. This is a symptom of a SMC sensor or CPU failure.
Sadly, at this point I think its time to call it a day as this system needs quite a lot of work to bring back.
Boy! You have quite a mess here.
So let’s start off with the charger issue, sadly the logic board has become damaged. The charging logic on it has failed likely caused by using a knockoff charger!
● [https://lifehacker.com/dont-replace-your-macbook-charger-with-a-cheap-knockoff-1825605569|Don't Replace Your MacBook Charger With a Cheap Knockoff]
● [https://beetstech.com/blog/oem-magsafe-chargers-vs-counterfeits-teardown-for-truth|OEM MagSafe Chargers vs Cheap Imposters: Teardown for Truth]
● [http://www.righto.com/2016/09/why-you-shouldnt-use-cheap-macbook.html|Lacking safety features, cheap MacBook chargers create big sparks]
● [https://www.youtube.com/watch?v=DrxAuhrrLU4|FAKE Magsafe MacBook Chargers on eBay - Watch before buying a Mac Charger]
Using these knockoff chargers over stresses the charging logic so when the battery gets old can push the system to failure. Often replacing the MOSFET’s can bring the system back to life and using a REAL Apple charger! But you still have to replace your battery as well as its worn out!
The next issue here is the 3 beep code that’s a RAM error! Either one of the SO-DIMM’s is bad or the socket connection is failing.
The last issue is the fan running at high RPM and never starting up fully. This is a symptom of a SMC sensor or CPU failure.
Sadly, at this point I think its time to call it a day as this system needs quite a lot of work to bring back.