A few things could be going on here with this, to be honest :
1) Have you tried reseting the PRAM /SMC while its booting?
2) have you made a backup of the unit recently just in case of # 3
3) Could be HDD failure that it is not picking up the boot drive hence the fans are going nuts.
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Personally id start with one and then go from there if you do end up opening up the unit make sure to reseat and double check all your internal connections before replacing parts ie.HDD. Also make sure that you give the fans and the heat sinks a good cleaning with compressed air.
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Personally id start with one and then go from there if you do end up opening up the unit make sure to reseat and double check all your internal connections before replacing parts ie.HDD. Also make sure that you give the fans and the heat sinks a good cleaning with compressed air. Also be vary careful when you do open the unit that you DON'T rip off the display cables only open it with about two or three inches of clearance just enough to disconnect the cables.
Personal Safety:
When you decide to open the unit unplug the unit from the wall and let it sit for about 20 mins so that any residual power still in the power supply has time to bleed off. Otherwise you will be receiving a nice jolt from it if you decide to stick your hands in the right off the batt, but you also stand the chance of completely destroying your unit with an ESD accident. Lets stay safe K
A few things could be going on here with this, to be honest :
1) Have you tried reseting the PRAM /SMC while its booting?
2) have you made a backup of the unit recently just in case of # 3
3) Could be HDD failure that it is not picking up the boot drive hence the fans are going nuts.
-
Personally id start with one and then go from there if you do end up opening up the unit make sure to double reseat and double check all your internal connections before replacing parts ie.HDD. Also make sure that you give the fans and the heat sinks a good cleaning with compressed air.
+
Personally id start with one and then go from there if you do end up opening up the unit make sure to reseat and double check all your internal connections before replacing parts ie.HDD. Also make sure that you give the fans and the heat sinks a good cleaning with compressed air.
Personal Safety:
When you decide to open the unit unplug the unit from the wall and let it sit for about 20 mins so that any residual power still in the power supply has time to bleed off. Otherwise you will be receiving a nice jolt from it if you decide to stick your hands in the right off the batt, but you also stand the chance of completely destroying your unit with an ESD accident. Lets stay safe K
A few things could be going on here with this, to be honest :
1) Have you tried reseting the PRAM /SMC while its booting?
2) have you made a backup of the unit recently just in case of # 3
3) Could be HDD failure that it is not picking up the boot drive hence the fans are going nuts.
Personally id start with one and then go from there if you do end up opening up the unit make sure to double reseat and double check all your internal connections before replacing parts ie.HDD. Also make sure that you give the fans and the heat sinks a good cleaning with compressed air.
Personal Safety:
When you decide to open the unit unplug the unit from the wall and let it sit for about 20 mins so that any residual power still in the power supply has time to bleed off. Otherwise you will be receiving a nice jolt from it if you decide to stick your hands in the right off the batt, but you also stand the chance of completely destroying your unit with an ESD accident. Lets stay safe K