Hi there,
I'm new to the forum and Macs in general. I always wanted one around the late 80's but could never afford one, so when I was bitten by the retro bug last xmas I started looking for one. That's when I realised that buying old Macs is like getting the bus: you wait for ages and then 3 come along at the same time. So after 3 months of searching I am now the proud owner of an SE, SE30 and Classic II in various states of repair, and the proud owner of some big problems!
So here it goes: SE30 video problem regular vertical bars as in linked image
I have done the following so far but no difference whatsoever.
-Board cleaned with IPA.
-Logic boards swapped between SE and SE30. Same problem with SE30 logic board in SE and SE logic board works fine in SE30,so must be prob with logic board.
-Simms (ROM and RAM) cleaned and reseated.
-PRAM battery replaced .
-RAM simms replaced with known good ones.
-Board recapped (except large electrolytics C2 and C11).
-Continuity of replaced caps checked and OK.
-Board visually inspected and two wires soldered in where corrosion had destroyed track (around DAC UE10 and UE12).
-Voltages on floppy connector checked and OK.
I think I'm going to try and analyse the bars on the screen and see if I can come up with an idea of what's going on...getting my head around that video interface is going to be a daunting task!
So I would be grateful for any info / tips.
Cheers! :b&w:
PS: Sorry about posting another topic on SE30 video problems but I have been reading most of the other threads on SE30 vid problems but bar one with a faulty demux (iirc) I think there was never a real solution.
I'm new to the forum and Macs in general. I always wanted one around the late 80's but could never afford one, so when I was bitten by the retro bug last xmas I started looking for one. That's when I realised that buying old Macs is like getting the bus: you wait for ages and then 3 come along at the same time. So after 3 months of searching I am now the proud owner of an SE, SE30 and Classic II in various states of repair, and the proud owner of some big problems!
So here it goes: SE30 video problem regular vertical bars as in linked image
I have done the following so far but no difference whatsoever.
-Board cleaned with IPA.
-Logic boards swapped between SE and SE30. Same problem with SE30 logic board in SE and SE logic board works fine in SE30,so must be prob with logic board.
-Simms (ROM and RAM) cleaned and reseated.
-PRAM battery replaced .
-RAM simms replaced with known good ones.
-Board recapped (except large electrolytics C2 and C11).
-Continuity of replaced caps checked and OK.
-Board visually inspected and two wires soldered in where corrosion had destroyed track (around DAC UE10 and UE12).
-Voltages on floppy connector checked and OK.
I think I'm going to try and analyse the bars on the screen and see if I can come up with an idea of what's going on...getting my head around that video interface is going to be a daunting task!
So I would be grateful for any info / tips.
Cheers! :b&w:
PS: Sorry about posting another topic on SE30 video problems but I have been reading most of the other threads on SE30 vid problems but bar one with a faulty demux (iirc) I think there was never a real solution.