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Finally got to work on my cabs again thanks to a much cleaner shed allowing me to actually get to them.  So far I'm 3 ou of 4 cabs that haven't been powered on for over 5 years working fine.  The other 2 cabs (Universal Cosmic Guerilla and a home built with real hardware Ikaruga/net booter) don't have joysticks mounted at the moment so haven't looked at them yet, I know one doesn't work but the other was working when put into storage.  Also found an 11 year old RaspberryJAMMA (v1) with a Pi2 on it that still works great.

Started on Friday with a four slot NEO-GEO LAI lowboy.  Unfortunately the board didn't want to read carts, pretty sure the slots got dirty while in storage (all carts were removed prior to storage to avoid them shaking out and damage occuring).  Pulled out a 2 slotter but it too didn't want to read carts.  Finally got a JAMMA NEO-GEO single slotter and dug the Big Red out - fully working NEO-GEO cab.  Will get to cleaning the 4 slotter and seeing whats what soon.  Have a couple of extra 4 slot boards on hand for parts if needed, one of them may actually still work too, I'll have to check that out.

With the NEO running I moved onto my first DIY cab I built maybe 15 years ago (and yet never finshed it up with T-moulding or any other trim).  It runs a 27 inch CRT TV (I bought new in 2001 or something) with the case sides cut off and the sheilded speakers relocated in to the cab as the JAMMA speakers (with optional ability to use the TVs audio amp and have stereo via changing a plug).  Got brave with this one and just threw in my test bench Pi5 setup and fired it up.  Button 1 was stuck down but otherwise working cab.  Didn't enjoy looking at my work from so long ago, it's not at all how I would do it these days... maybe one day I'll pull this one apart, fully decase the TV and fix it up nice.  Also my kids drawed on it with crayons or something while they were toddlers.

Today I was working on my Galaxian/Moon Cresta cab (LAI cab from the 80s with both games and a rotary switch to swap game), reaching into the cab to adjust the monitor and my arm brushed the back of the coin mech terminals.  I felt the static discharge and aparantly the monitor did too...  Luckily I'm pretty sure the chassis needed some love anyway as the edge of the suction cup side was wavy - which was why I was trying to adjust it in the first place.  Also for those who might care, it's not the original monitor.  Any way it now shows 3 pictures, none of them syncing right.  Pretty sure the game board survived but again it needed work anyway (Galaxian has a RAM error but plays with graphics glitches, MC doesn't work right).  At some point in it's life JAMMA wiring has been modded in too so while I'll try to fix the game boards it's not the end of the world if I can't figure it out.
Pretty sure the guy I bought it off (or another previous owner) damaged or removed the cab grounding or this shouldn't have happened so I'll look into that too.  Also, I probably shouldn't be working on cabs in Uggs...

After that I fired up the Yachiyo cocktail table (I think it was originally Space Stranger 2) and stuck the Pi2 setup I found in it as the cab (I'd previously made a jamma adaptor for the cabs original harness, no mods to the cab itself but I don't have the gameboard).  This ones monitor chassis was rebuilt professsionally about a decade ago when I aquired the cab and semi restored/restomodded it.  Fully working cab.

Anyone know monitors well enough to give some advice (when I get to it)?  All I've really done before with chassis is check capacitor ESR and replace as needed (which annoyingly may have been all it needed before I reached into the cab).  I have a 20 inch tube and chassis originally intended for another cab that I may just swap into the Galaxian for now.

I always start with a shotgun recap.  Why?  Because when you ask people at places like KLOV and what not about monitor issues,  the first thing they ask is... "have you recapped the monitor?".... seems the most logical "first" for me.  Of course this isn't the case if there is something OBVIOSULY wrong (blown transformer,  etc)...