Well that's unfortunate. I wish I really knew what the issue was. My biggest problem with this whole situation is this machine worked 2-3 years ago. Yes it had intermittent issues and would sometimes give us voltage errors but typically after rebooting it a few times or unplugging it or switching outlets or even someone giving the control board a good smack would get the device working again. Until I opened it up (again, as far as I know, and my other friends are not technology inclined) no one had touched the internals of the machine in the years we had possession of it I was the first to start unplugging things and touching actual hardware and I noticed the edge of the IDE port like that the first time I removed the drive. So my issue is I do not feel like that port is the issue...I have broken plastic pieces on computer motherboards like that and as far as the pins were okay the plastic never caused an issue, hell I'd bent pins and one time on an old motherboard I even broke a pin and the drives would function so I cannot help but feel like the IDE header is still functioning. Now, the board has 2 molex and 2 IDe headers, is there no way with dip switched or something to try and have the machine look for/attempt to boot from IDE port 2? Is there no way to try and switch to the other port and boot? I guess in the next couple days I will try to look at the chips you mentioned and see if I can see anything wrong with them.
I thought that "kit" I linked would give you the replacement/updated eprom and then the "complete" data so you could replace the eprom and then that would allow the board to boot from the compact flash, it says it's compatible with 2005 and 2006 boards so (aside from the current issues we have) why would that "kit" not work to upgrade this board/unit to a newer version? Now that I tested the PSU with a proper multimeter I do not think that is any issue anymore (despite being old and not in great condition the board seems to be receiving and putting out proper voltage).
So I guess I have those couple questions above for last possible steps to try and trouble shoot but ultimately, where do I/we go from here? What, in your experience, do you recommend I do? If it is a full board replacement, is there a specific version I need or you recommend that I try to get? Do you sell boards yourself or do you know of websites that do and have any recommendations where to go to get one and a specific version? Depending on cost of a board am I better off just trying to get like a 60 in 1 or 200 in 1 board that might have trackball games and use that, or try and build a PC inside of it for emulation? Is it worth trying to send the board for repair if you do these types of repairs (I understand if it's that one chip there's nothing I can do about it) but if you see and work on it and test it in person do you think there is anyway of reviving it?
Also from the pictures I posted of the cab itself and the internals, does it actually look like a GT machine to you, or another cabinet that was re purposed by someone else for this?