Well, it looks like the fault is in the PAV board itself. Not dead, but still very weak.
Solution?
The "donor" system arrived today. It's an Indigo G3, case is pretty scuffed but the internals are mostly good. Video and power components are in perfect working condition, although the hard disk is trashed (major clicking noises going on there). The perfect system to resurrect the iMac SE. This also means I can probably get away without separating the tube and PAV board- I can swap it in with a single swoop provided the divider plate and heatsink assembly matches. This will be determined as I begin to tear the machine down. Otherwise it means i'm up for a CRT/PAV job.
The rest of the components I had no plans for. 500MHz PowerPC G3 with 256mb of RAM. Perfect logic board for my other iMac, a Ruby, which currently has a 400MHz G3 with only 128mb of installed RAM.
So, the build begins!
Pretty sure I won't die in the process. I've bashed around with many a CRT from 21" monsters to little 9" Mac Classic displays. Yes they are fragile and contain an extremely high voltage, so following the proper guidelines and taking all necessary precautions is a requirement. not an option.
UPDATE - 4:22 PM: I've swapped the G3 600 board into the Indigo for a test run. Now the CRT in that machine is doing the same thing. The project is taking an unexpected turn here as i'm pretty sure the issue is with either the Logic Board or the Down Converter and not the Cathode Ray Tube or Power/Analog/Video board.
UPDATE - 4:30 PM: The 600MHz Logic Board is at fault.
Solution?
The "donor" system arrived today. It's an Indigo G3, case is pretty scuffed but the internals are mostly good. Video and power components are in perfect working condition, although the hard disk is trashed (major clicking noises going on there). The perfect system to resurrect the iMac SE. This also means I can probably get away without separating the tube and PAV board- I can swap it in with a single swoop provided the divider plate and heatsink assembly matches. This will be determined as I begin to tear the machine down. Otherwise it means i'm up for a CRT/PAV job.
The rest of the components I had no plans for. 500MHz PowerPC G3 with 256mb of RAM. Perfect logic board for my other iMac, a Ruby, which currently has a 400MHz G3 with only 128mb of installed RAM.
So, the build begins!
Pretty sure I won't die in the process. I've bashed around with many a CRT from 21" monsters to little 9" Mac Classic displays. Yes they are fragile and contain an extremely high voltage, so following the proper guidelines and taking all necessary precautions is a requirement. not an option.
UPDATE - 4:22 PM: I've swapped the G3 600 board into the Indigo for a test run. Now the CRT in that machine is doing the same thing. The project is taking an unexpected turn here as i'm pretty sure the issue is with either the Logic Board or the Down Converter and not the Cathode Ray Tube or Power/Analog/Video board.
UPDATE - 4:30 PM: The 600MHz Logic Board is at fault.