Recent content by GreenBar0n

The removal of UA5 with a hot air station, provided you use flux, would be very easy to do, takes just minutes. As long as the traces aren't removed along with the chip, - which can happen if the board is already damaged, or by trying to pull the chip off before the solder is hot enough -...

Was the second picture shown above, of the UA5 sound chip, taken recently? I ask because, if you paid someone to remove that chip and clean it, they left a lot of electrolyte under the chip and on the board still. That's conductive and could be causing your infinite Reset loop. If you wanted to...

I have a pair of SE's, but they both have always worked well, I've not needed to work on those; but my SE/30's taught me that it's the Sound chip that releases the Reset line and drives the entire Reset circuit to 5v. Hoping someone else more familiar with the SE can fill in the details for us.

Glad to hear you've found the symptom. As far as the cause, I don't think I've ever heard of a Sound chip going bad without being corroded for one reason or another, but it's my understanding that if the actual Reset button is operating correctly, the Sound chip is ultimately responsible for...

Have you checked to see if the Reset and Programmer buttons on the Logic Board are operating correctly, and not stuck?

Thanks for confirmation with your experience. I've since come to realize that those clock frequencies that are shown on pg. 46, are listed with the ROM SIMM inserted and with a fully functional Logic Board; but it's confusing because the 'Walk the Bus' test tells us to remove the ROM SIMM for...

Will definitely try this Macpack for the SE's, I had not seen this before. Thanks!

After fighting with my first simasimac SE/30 for over a year and then finally getting it to work, I miss having that challenge waiting around to be solved, might have to find another simasimac board, or puzzle to solve. :) For the Ultimate BlueSCSI image for an SE/30 with 8Gb of RAM and the...

Ultrasonic bath would be a great idea, I see the flux everywhere too. @Duke09, just to be 100% clear: if you were to only insert 4Mb of RAM total - instead of 8Mb, in to either bank 0, or bank 1, you still get the same results?

Can you provide some high-res pics of your logic board, top and bottom? Curious if there are any signs of corrosion. If you move the RAM from bank 0 to bank 1, is it the same issue still with failing to pass tests, or boot?

Took a while to get the SE's going, both now have 4Mb and have been completely recapped, floppies restored, and all of these have BlueSCSI V2 in the expansion slot. Wasn't expecting the toast to fly faster on the SE/30's than it does on the SE's, the difference between 16Mhz and 8Mhz is twice...

The PSU takes a bit longer than the other boards.

If the pad lifts off the PCB, it will still be connected to the trace that leads to the rest of the circuit, literally hanging by a thread. Which can still be repaired by splicing into that trace. I push the old caps lightly down and twist them back and forth with needle nose pliers, until the...

The only thing the Dead Mac Scrolls says about the SE and checkerboard, which apparently only affects the FDHD model: Maybe the ROM sockets need a cleaning?

It would've taken me forever to find and understand all the different file formats available, thanks for the excellent info, Mark_W!