MVS aerofighter 2 graphic glitch [Solved/Neo-Zmc]

[Retro Mecano]

This one is driving me crazy.

The exact same glitch is present whaterver i do.

What i did so far:

- Both PROG and CHA borad cleaned and checked for brocken traces. Found 2 and patched them.
- Checked PRom CRC in Unibios and it matches OK.
- S1 ROM does not match CRC in Mame so burnt a replacement eprom
- C1 to C4 match fine with Mame.

So after all this, text no shows fine in unibios, but the exact same glitch is there, no improvement.

To be honest i'am lost..

 

[Retro Mecano]

UPDATE AND FIXED.

That b**ch costed me few hours testing continuity to deduce that Neo-273 was dead. Replaced with the first, seemed f*** up also, so before shooting the mf i gambled and changed 2nd time the 273. And it's alive!

I never saw before graphic glitches due to defective neo-273.

Well let's keep this for the record, if anyone needs it.

Cheers

 

[NeoRocker]

And were to get a replacement neo-273 if not grabbing it from another pcb?

 

[Retro Mecano]

And were to get a replacement neo-273 if not grabbing it from another pcb?

Indead. I took it from a dead MV1AX slot.