Search results for query: *

Shit. Thanks.

Sigh. My ignorance is showing. The chip I took out reads: MALAYSIA 413 122FF TIBPAL 16L8-25CN Some searching told me the bottom line is the model of the chip, I couldn't find anything matching "413 122FF" so I ordered a chip off Ebay. The top line reads: MALAYSIA 066 031FF When I put this...

So, what the subject says. The volume pot still crackles through the speakers so I know the amp is working. I've reseated the audio cable going from the board to the audio amp... What's next?

Good for me! Is this going to be a bitch to find a replacement?

If it helps diagnose any, when I boot up with the test switch engaged it looks similar but with more vertically striped scrambled crap.

Opened it up, and there were several scummy looking chips that may have had a beer poured through them at some point. I cleaned and reseated all the larger chips with no luck. Chips U40-U42 needed some love so I pulled those one at a time and cleaned them and put them back. Booted the machine to...

Alright. I will reseat when I have a chance and report back.

Our Terminator 2 machine just decided to freak out and scramble most of the sprites. On boot it shows a ton of bad ROMs but I doubt they are actually bad, or at least not so many of them. See pictures; the right half of the screen is dark but I'm about 95% sure that's a monitor issue. So where...

Woah. That's what caused the issue with the initials??? How weird. I'll check on mine.

Did you ever find a solution? My machine is doing the exact same thing with player 1, where I can't enter initials but the button works otherwise.

Just swapped in the PSU from Mario Bros and just got new jibberish on the screen. Powered down for fear of roasting something again. Aggh

We do have the multi connector harness in our machine. We probably also have another Nintendo cabinet in the warehouse that I could pull a supply from. Is there any reason to specifically not go the Happ route? In the interest of getting something quick and reliable that had a fairly low risk...

Well damn, that's handy.

The saga continues. Before I got to take the board out, I got word that it "freaked out" and was stuck with weird characters on the right side of the screen, or just "1UP L=00" at the top. Had the board taken out and brought it home, popped cleaned and reseated every socketed chip, and...

I cleaned the edge connector on the side of the board that's facing up. I haven't unscrewed it yet to get to the other side. The voltage was reading at like 5.2 when i tested it, and i turned it back to about 5.05 thinking that maybe the higher voltage was maybe screwing it up. No such luck.

The MK1 machine at the barcade almost always has an issue when they flip the power on to all the machines... Everything powers on, but nothing shows up on the screen. It's sort of a bright black (does that make sense?) screen that fixes itself if you power cycle the machine, including just...

So I spotted two other 7474's too. Since replacing the ones that were socketed didn't do anything, I plugged the old ones back in and opted to use the four new ones and two sockets (doh! Shoulda ordered 6 and 4!) to replace the 4 soldered onto the board. The desoldering and soldering went...

I'm 95% sure it's not a beer thing... I hear about that kind of thing pretty quickly. It's a hard bar to conceal that kind of thing in. Checking those chips sounds like a logic probe kind of process, which will have to wait until my Christmas list is fulfilled :)

Seriously, I'm sure this is not a magnetic field thing.

Thanks. When I've got the time I'll pull those boards, clean everything, and try again.