SemperFi94,
THAT is a classic symptom of what is called "Simasimac", or "Zebra-like pattern". I refer you to the following link below:
http://www.biwa.ne.jp/~shamada/fullmac/repairEng.html#SimasiMac
Basically, you can try the following before going even further:
Step 1.) Open up the SE/30 case and remove the logic board (circuit board on the very bottom).
Step 2.) Reseat the RAM and ROM SIMM (the tiny cards that stand vertically from the logic board). Also try cleaning the metal contacts on the bottom of the cards with a pencil eraser or rubbing alcohol.
Step 3.) Replace the lithium battery (purple and green or green and white colored 1/2-AA).
Step 4.) Reconnect the logic board, place it back inside the SE/30 and turn it on.
If the startup tone or video display doesn't clear up or work as normal, then try the following:
Replace capacitors C1, C3, C4, C5, C7, C8, C9, C10, C12, C13: (47µF 16V) and C6: (1µF 50V). You can also try "pulling" the sound chip UB10 and/or UB11, but if you do that, you will not be getting sound after doing so.
If you feel that replacing the caps is the way to go but not for the feint at heart, let me know. You can contact me by private message and we can arrange for you to send the logic board to me and I'll do the repair for you. Replacement caps can be purchased from 68kmla forum member Trag. So get in contact with him also about buying an SE/30 recap kit.
73s de Phreakout. :rambo:
THAT is a classic symptom of what is called "Simasimac", or "Zebra-like pattern". I refer you to the following link below:
http://www.biwa.ne.jp/~shamada/fullmac/repairEng.html#SimasiMac
Basically, you can try the following before going even further:
Step 1.) Open up the SE/30 case and remove the logic board (circuit board on the very bottom).
Step 2.) Reseat the RAM and ROM SIMM (the tiny cards that stand vertically from the logic board). Also try cleaning the metal contacts on the bottom of the cards with a pencil eraser or rubbing alcohol.
Step 3.) Replace the lithium battery (purple and green or green and white colored 1/2-AA).
Step 4.) Reconnect the logic board, place it back inside the SE/30 and turn it on.
If the startup tone or video display doesn't clear up or work as normal, then try the following:
Replace capacitors C1, C3, C4, C5, C7, C8, C9, C10, C12, C13: (47µF 16V) and C6: (1µF 50V). You can also try "pulling" the sound chip UB10 and/or UB11, but if you do that, you will not be getting sound after doing so.
If you feel that replacing the caps is the way to go but not for the feint at heart, let me know. You can contact me by private message and we can arrange for you to send the logic board to me and I'll do the repair for you. Replacement caps can be purchased from 68kmla forum member Trag. So get in contact with him also about buying an SE/30 recap kit.
73s de Phreakout. :rambo: