Macintosh SE crushed

[Highsheep1]

For my Macintosh SE， it used to be great, but when I plug in Blue SCSI, and it works well, the machine crush. I immediately remove the blueSCSI and restart, but the machine just restart automatically, just like someone press the reset buttum. And the "beep" sounds also occured with the resetment. During this period, the screen just be white, you can see it on pictures. And the built-in hard drive light is always on. I tried to remove the hard disk and it's still the same. Can anyone tells me what's the problem and how can I fix it.

 

[Highsheep1]

Please help me. Also, the mouse can work.

 

[cheesestraws]

If it's resetting itself, check the voltages out of the power supply.

 

[Highsheep1]

If it's resetting itself, check the voltages out of the power supply.

If it's resetting itself, check the voltages out of the power supply.

I plug in with 220V. So there should be no problem with voltages I think

 

[cheesestraws]

I meant the voltages coming out of the power supply in the computer. You can check them on the floppy port.

 

[Highsheep1]

I meant the voltages coming out of the power supply in the computer. You can check them on the floppy port.

Well, I think it goes well? Because I put in my floppy disk, and it works well with normal sounds. Or could you tell me about how to determine...

 

[cheesestraws]

Do you have a mutlimeter?

 

[demik]

Just out of curiosity, what kind of BlueSCSI did you use (a picture of it would be fine) ? Why do you suspect it ?

 

[Highsheep1]

Do you have a mutlimeter?

Yes.

 

[Highsheep1]

Just out of curiosity, what kind of BlueSCSI did you use (a picture of it would be fine) ? Why do you suspect it ?

em.. I bought it from local seller.And I think it works well

 

[joshc]

Use your multimeter to measure the output voltages of the power supply at the floppy port. What you are doing is measuring the 12V and 5V rails of the power supply. Ruling this out first is a good idea, if your power supply is OK then something else is causing a problem.

 

[cheesestraws]

Use your multimeter to measure the output voltages of the power supply at the floppy port. What you are doing is measuring the 12V and 5V rails of the power supply. Ruling this out first is a good idea, if your power supply is OK then something else is causing a problem.

Yes, this is what I was referring to. Thanks @joshc for the diagram

 

[Highsheep1]

Use your multimeter to measure the output voltages of the power supply at the floppy port. What you are doing is measuring the 12V and 5V rails of the power supply. Ruling this out first is a good idea, if your power supply is OK then something else is causing a problem.

Use your multimeter to measure the output voltages of the power supply at the floppy port. What you are doing is measuring the 12V and 5V rails of the power supply. Ruling this out first is a good idea, if your power supply is OK then something else is causing a problem.

View attachment 76755

Hi, I tried, and both of them(threerAre all CORRECT. What should I do next. I have no idea how to do....

 

[Highsheep1]

Use your multimeter to measure the output voltages of the power supply at the floppy port. What you are doing is measuring the 12V and 5V rails of the power supply. Ruling this out first is a good idea, if your power supply is OK then something else is causing a problem.

Use your multimeter to measure the output voltages of the power supply at the floppy port. What you are doing is measuring the 12V and 5V rails of the power supply. Ruling this out first is a good idea, if your power supply is OK then something else is causing a problem.

View attachment 76755

Hi, I tried, and both of them(threerAre all CORRECT. What should I do next. I have no ideo

Yes, this is what I was referring to. Thanks @joshc for the diagram

I tried, but it all work well. What should I do next..

 

[cheesestraws]

Did you watch them over time while the machine was misbehaving/resetting?

 

[Highsheep1]

Yes, it just remain resetting and the beep sound goes on.

 

[Highsheep1]

Oh, and I can tell you what happens last before it crush. I opened the machine, and it worked. But for few minutes, it opened debugger automatically, and can't be existed. And for another few minutes, there was a white square with nothing on the center of the screen. Mouse and keyboard also couldn't use. I restart and it became to this situation.

Did you watch them over time while the machine was misbehaving/resetting?

 

[Highsheep1]

Oh, and I can tell you what happens last before it crush. I opened the machine, and it worked. But for few minutes, it opened debugger automatically, and can't be existed. And for another few minutes, there was a white square with nothing on the center of the screen. Mouse and keyboard also couldn't use. I restart and it became to this situationsor

Sorry, I mean I couldn't close the debugger

 

[Highsheep1]

Just out of curiosity, what kind of BlueSCSI did you use (a picture of it would be fine) ? Why do you suspect it ?

Oh, sorry. I suspect because.before I pluged in, every thing goes well. But after I tried this, many different problems came

 

[Highsheep1]

What should I do... This is very strange.