I has problem about picture of Macintosh SE when I connect J11 speaker

[go2thanawat]

I buy Macintosh SE from Japan ,I can boot by blue scsi is work normally, but yesterday is can not boot and screen show like attachment picture and has crack sound from speaker ,
But I remove speaker from J11 pin is can boot normally but hang and reboot every time when I play some game. How can I fix it?

Remark . I check 2 pin of j11 connector from mainboard has resistant 158 ohm.
And resistant from 2 pole of speaker is 63 ohm

Sorry for my bad English.

 

[ymk]

The speaker resistance is good. Measuring the speaker header is meaningless.

Check your power rail voltages. A low 5V rail will cause instability.

 

[go2thanawat]

Thank you for reply , I recheck resistant of j11 connector again, resistant is change when I put board on rf shield , I decided to put tape under the logic board , it’s work normally not self restart and sound come to work again

 

[Juror22]

I recheck resistant of j11 connector again, resistant is change when I put board on rf shield , I decided to put tape under the logic board , it’s work normally not self restart and sound come to work again

Great, simple, fix. Glad its working again!