JDW | Recapped Macintosh SE/30, Chime & Lines at Cold Boot @JDW- | Uploaded August 2011 | Updated October 2024, 1 minute ago.
Video shows a Macintosh SE/30 with a recapped logic board. Old leaky electrolytic capacitors were carefully removed, the board cleaned, and new tantalum caps soldered in. This is the second motherboard I've come across where recapping didn't solve Simasimac (horizontal lines at cold boot). I cleaned the board a second time with alcohol, but to no avail.
▶ UPDATE! I ultimately shipping my board off to a knowledgable associate in the 68kMLA forums, TechKnight, who kindly repaired the problem. He replaced the BOURNS filter at RP2, and he found PCB trace leading from the RP1 chip to the closest RAM socket and soldered a wire to repair it. You can see the repaired motherboard in this photo:
dropbox.com/s/4d9d630b6hie03v/SE30_MB_TantalumRecap_TOP.jpg?dl=0
Video shows a Macintosh SE/30 with a recapped logic board. Old leaky electrolytic capacitors were carefully removed, the board cleaned, and new tantalum caps soldered in. This is the second motherboard I've come across where recapping didn't solve Simasimac (horizontal lines at cold boot). I cleaned the board a second time with alcohol, but to no avail.
▶ UPDATE! I ultimately shipping my board off to a knowledgable associate in the 68kMLA forums, TechKnight, who kindly repaired the problem. He replaced the BOURNS filter at RP2, and he found PCB trace leading from the RP1 chip to the closest RAM socket and soldered a wire to repair it. You can see the repaired motherboard in this photo:
dropbox.com/s/4d9d630b6hie03v/SE30_MB_TantalumRecap_TOP.jpg?dl=0