Hi all, my first post, thanks for having me
I have an AES AEC here that has problems with the graphics, got it cheap on ebay.
Its the first original modeI I got, repaired about half a dozen japanese AES3-5/AES3-6 ("junk" from ebay and buyee.jp), one only needed the slot cleaned (they all do hey), the others had the classical rotten traces that needed to be fixed/bridged/jumped.
There was previously work done on that PCB, checked and re-soldered everything that was done.
I've switched the fast VRAM as I was told that this would cause the graphic problems, tested every single trace, all fine, there was some corrosion on the LSPC-A0, so I reflowed all the pins, no improvement, so I took it off to check for corroded traces, they are all perfect, put the LSPC-A0 back, works as before.
The LSPC-A0 has a discolouration that really looks like it burned up at some point.
Now, I have a strong suspicion that the LSPC-A0 is fried and causing this problem.
Ordered a MVH MV1 with an Z80 error off ebay, these LSPC-A0 are hard to find and not cheap, first gen NeoGeo ICs.
While I'm waiting for the (hopefully working) LSPC-A0 to arrive (takes a while as it comes from overseas), is there something else I should test/check for in the mean time?
I don't have an oscilloscope, just ordered a logic probe which also takes a few days to arrive. Multimeter, Soldering Iron, hot air station, flux, low melt solder (bismuth) and that stuff I have and I'm capable using it, not a pro though, just a hobbyist.
I burn my own Unibios and Diagnostic Bios, the latter says "all tests passed".
Also, I'm new here, is there really no search feature in the forum or am I blind?
I can show more pics/videos if needed.
I have an AES AEC here that has problems with the graphics, got it cheap on ebay.
Its the first original modeI I got, repaired about half a dozen japanese AES3-5/AES3-6 ("junk" from ebay and buyee.jp), one only needed the slot cleaned (they all do hey), the others had the classical rotten traces that needed to be fixed/bridged/jumped.
There was previously work done on that PCB, checked and re-soldered everything that was done.
I've switched the fast VRAM as I was told that this would cause the graphic problems, tested every single trace, all fine, there was some corrosion on the LSPC-A0, so I reflowed all the pins, no improvement, so I took it off to check for corroded traces, they are all perfect, put the LSPC-A0 back, works as before.
The LSPC-A0 has a discolouration that really looks like it burned up at some point.
Now, I have a strong suspicion that the LSPC-A0 is fried and causing this problem.
Ordered a MVH MV1 with an Z80 error off ebay, these LSPC-A0 are hard to find and not cheap, first gen NeoGeo ICs.
While I'm waiting for the (hopefully working) LSPC-A0 to arrive (takes a while as it comes from overseas), is there something else I should test/check for in the mean time?
I don't have an oscilloscope, just ordered a logic probe which also takes a few days to arrive. Multimeter, Soldering Iron, hot air station, flux, low melt solder (bismuth) and that stuff I have and I'm capable using it, not a pro though, just a hobbyist.
I burn my own Unibios and Diagnostic Bios, the latter says "all tests passed".
Also, I'm new here, is there really no search feature in the forum or am I blind?
I can show more pics/videos if needed.
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