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| Just got a Macintosh Classic ii |
Posted by: JoeRocker39 on 2024-03-28 15:06:03
It won’t let me get it to boot up and it just makes a humming noise. The screen is black what should I do to get it to work |
Posted by: Nixontheknight on 2024-03-28 15:08:13
It won’t let me get it to boot up and it just makes a humming noise. The screen is black what should I do to get it to work sounds like the analog board is resetting due to overcurrent, try recapping the logic board and analog board |
Posted by: JoeRocker39 on 2024-03-28 22:05:25
Are you certain that re-capping both boards will fix the problem |
Posted by: Nixontheknight on 2024-03-28 22:12:05
Are you certain that re-capping both boards will fix the problem I'm certain |
Posted by: dochilli on 2024-03-29 10:23:21
Did you measure the voltages at the floppy port?
There are a lot of parts on classic AB that can be defect. Most often: DP3 and DP4 (1N4148), TDA4605, CNY17G, IRFBC40. Could be that you have to replace some of these.
Recapping AB and LB should be done. Take the battery out of th LB. |
Posted by: robin-fo on 2024-03-29 10:39:43
Are you certain that re-capping both boards will fix the problem Well.. It will certainly not work without doing this. If it is everything you need to do, you will have to find out. |
Posted by: JoeRocker39 on 2024-03-30 20:11:07
Did you measure the voltages at the floppy port?
There are a lot of parts on classic AB that can be defect. Most often: DP3 and DP4 (1N4148), TDA4605, CNY17G, IRFBC40. Could be that you have to replace some of these.
Recapping AB and LB should be done. Take the battery out of th LB. No I didn’t because I have not opened it up |
Posted by: JoeRocker39 on 2024-03-30 20:20:11
No I didn’t because I have not opened it up What I am going to do is to have a computer repair technician open it up to remove both boards and send them out to a board repair company |
Posted by: robin-fo on 2024-03-31 00:58:33
No I didn’t because I have not opened it up Then it might as well be battery-bombed. The most reasonable strategy for you would likely be to trade your Mac to somebody here and buy a refurbished one instead.. 😕 |
Posted by: dochilli on 2024-03-31 02:38:14
You do not have to open the classic to measure the voltages. You can do it at the floppy port. The only things you need are a voltmeter and a little paperclip. |
Posted by: JoeRocker39 on 2024-03-31 06:22:57
Then it might as well be battery-bombed. The most reasonable strategy for you would likely be to trade your Mac to somebody here and buy a refurbished one instead.. 😕 Nope I will get it refurbished |
Posted by: JoeRocker39 on 2024-03-31 07:09:32
I'm certain Please explain why you are certain that doing a re cap will fix the problem |
Posted by: Phipli on 2024-03-31 07:14:49
Please explain why you are certain that doing a re cap will fix the problem Recapping is a required /necessary first step, but it won't certainly fix the machine, but it might. Other things can be wrong as well, but it is certain that the caps need replacing, as they always do on these machines and they cause damage by corrosion.
To warn you, it is often cheaper to buy a machine that has already been recapped than pay for one to be repaired. Most of us repair our own.
But interestingly, the Classic II is one of the easier logic boards to recap and if you're interested in learning skills, it might be a good first project. Would you be interested in learning? |
Posted by: JoeRocker39 on 2024-03-31 09:04:35
Well.. It will certainly not work without doing this. If it is everything you need to do, you will have to find out. To anyone who reads this thread I am not going to give you this Macintosh because I am going to have it repaired |
Posted by: Phipli on 2024-03-31 09:47:27
-deleted- |
Posted by: Phipli on 2024-03-31 09:49:38
To anyone who reads this thread I am not going to give you this Macintosh because I am going to have it repaired Most people here are trying to help you, but warning you that it is sometimes expensive to pay someone. |
Posted by: JoeRocker39 on 2024-03-31 10:48:33
To anyone who reads this thread I am not going to give you this Macintosh because I am going to have it repaired I appreciate all of your help but keep in mind that:
1. I am not experienced in board level repairs.
2. One of you mentioned certain numbers that must relate to certain electronic parts but I have no clue what they are
3. I prefer to pay a professional to make the repairs necessary
Thanks All |
Posted by: JoeRocker39 on 2024-03-31 12:19:36
I appreciate all of your help but keep in mind that:
1. I am not experienced in board level repairs.
2. One of you mentioned certain numbers that must relate to certain electronic parts but I have no clue what they are
3. I prefer to pay a professional to make the repairs necessary
Thanks All Ok I am getting the boards re- capped for $175.00 plus postage and $95 bucks to open it up to remove and replace both boards |
Posted by: eschaton on 2024-03-31 14:16:25
What I am going to do is to have a computer repair technician open it up to remove both boards and send them out to a board repair company Why did you get it in the first place if this is what you’re going to do?
It’s like you bought a classic car without checking under the hood, it got dropped off a trailer into your driveway, and now you’re wondering why it won’t start.
Then when people start giving you advice about the standard maintenance you need to do, you’re asking if each task will make it start when nobody knows what the damage or wear and tear actually is. And now finally you’re saying “I’m just sending it to a professional.” |
Posted by: JoeRocker39 on 2024-03-31 16:04:00
Why did you get it in the first place if this is what you’re going to do?
It’s like you bought a classic car without checking under the hood, it got dropped off a trailer into your driveway, and now you’re wondering why it won’t start.
Then when people start giving you advice about the standard maintenance you need to do, you’re asking if each task will make it start when nobody knows what the damage or wear and tear actually is. And now finally you’re saying “I’m just sending it to a professional.” Listen
1. I was trained to repair vehicles but not computers
2. It is my computer and my choice to use a professional to repair it so if you don’t like that I apologize but it’s my money to spend on my Macintosh Classic ii |
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