Recent content by advans14

Rarer than any overrated rare cave pcb for sure. Your best bet is to extrapolate the info from the 2931. They are all pretty similar in regards to how they work

No such a thing. I’ve turned off the 2930 up to 20-30 times in various spans. Prob needs a full cap kit. Plus psu rebuilt

Most likely cold solder joints

Bump

Bump!

Id look for broken switch wires. Let me know if you need any ref pics.

Ive fixed and restored a broken one of these before. Good unit.

Looking for any other troubleshooting pointers on this one. Last time I owned NBA Jam was about 2009, and circling back to this hardware now and getting refreshed it seems there are more failure cases to look at. History - purchased as sold working several months ago. Initially took out of box...

where the power comes in from the AC side, pre DC output. so start back where it plugs into the AC. usually there are fuses, diodes, PTC's, etc that can blow preventing operation.

yeah not sure. i think there were some 16b stuff that doesnt require encrypting, but like scuba said there is the mcu at the top left. also sometimes the z80 is different. pretty sure they never released a non encrypted game on the 16 from factory (but i dont know much the unique variants)

bunch of bullshit. well, like always perhaps some surplus place will have a data sheet somewhere or supplier.

Sucks. What company? That is why decapping things have become so important.

1. caps should have polarity marked on the board. if they dont, post a pic. if the board was working before, it is obviously the work you did so you need to inspect each spot where a cap was changed, no way around that or guessing on our part can help. a thorough visual inspection needs done. 2...

yup, boards are the easy part, its the customs or any NLA chip that makes certain repros just "blanks" etc. i have done several.

you will need to get your multimeter out and start probing components. if there is no output anywhere on any rails, perhaps something blew out on the hot side.