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Finally got my JLCPCB and Mouser orders.. Just programmed (and verified) a SST39SF010A with CPU Vol II ROM, now need to solder up a PCB to fully test it. Will also do a test print of a revised case (based on @Elemenoh's design) that goes together with M2 screws - much easier print for non-resin...

Startup chime?

OK cool! No need for apologies. I'll cancel my appointment with my psychologist though.. :LOL:

Maybe I'm going insane but that has the old gerber in it... I just downloaded the one you attached and checked...

@jajan547 can you check the gerber files in the archive in the first post? I was about to place an order when I noticed that the Rev1_SMD gerber has the original routing that needed to be bodged. SuperSVGA posted updated gerber in post #164 on the other site, which looks correct (or at least...

@Elemenoh I printed the STL's on my Ender 3 today and they came out pretty great. I was worried about removing all the support structures around the itty-bitsy pins etc, but it came off in one piece without breaking anything. I have also ordered some from JLCPCB (~$20 for 4 enclosures) to see...

OK, crisis averted. Dry joint - very obvious under microscope - wobbling around like a drunk on Saturday night... :) Works great now. Will make some boards though as I don't have the full complement of carts. I've got a TL866CS, but will need to grab an adapter for the ROM chip as I've only...

Sorry, I meant my stock cart. I've managed to get it apart without breaking anything. Just going over it all with my multimeter now.. You're probably right though - I'm assuming a dry solder joint somewhere...

There's something amiss with my CPU Test Vol 1, v.1.1.1 cart. 9 our of 10 times when the TS is turned on with that cart installed the TS screen doesn't come on the LED flashes red after a second or so. When it does power up the cart seems to be perfectly fine. Guessing a loose connection inside...

Hey, I'm in Sydney and will endeavour to get there!

OK, this is the first time I'm getting JLCPCB to populate a board. I assume for the question re edge rails/fiducials we should be saying no - i.e. use the board as-is?

Wow, what an interesting site! Thanks for the link!

@craig - where did you source the new DB19 female connector?

I'm interested in understanding the answer to this also - ie how does the sun alone reverse the damage done by the sun...?🤷‍♂️ I've got a battered up SE/30 case that's being replaced by a MacEffects clear case - so I might just give it a shot and see what happens.

Sitting here with my 512K and it’s been powered on for 15 minutes now and Q2 is still cool enough to touch. My thermometer says it’s 33C. As mentioned this is completely stock. Haven’t even recapped it as there’s no need currently. Let me know if you need anything else.

https://www.ebay.com/itm/325083285642?hash=item4bb079488a:g:ySMAAOSwCFNbWwK-

I've got an unmodified international 512K and haven't noticed any overheating issues like you mention - mind you, I haven't run it for hours on end. If I get time over the weekend I'll crack it open and leave it running for a bit to see if Q2 gets overly hot. Will dig out my contactless...

Nothing to do with me - just saw this on Indiegogo and thought it might interest some here. I signed up for a pack just for giggles: https://igg.me/at/shargeekretro35/emal/29382073 (Mods feel free to delete if not appropriate)

They won't all be bad - so I'm going to start with the opto as I believe it's a pretty common fault, then the TDA, and yes the mosfet. The diodes should be able to be checked in circuit, so maybe check those first. No real point replacing parts if they aren't broken..

I'm in a similar position with my Classic II. I've recapped like you, and next on the list is the TDA4605, zener diodes and the optocoupler