MV1FZS And one cart problem

[oguz]

Hello everyone,

My MV1FZS has some problems =)

And also my sidekicks 11 has glitches and sound problems noises too (there were no sign of life when i bought but after deep cleaning on connector it started to show something)

P.S. sidekicks tried on working board.

see photos of universe bios and neo diag as well.

From what i have read forums. for the board; I should change pair of CXK5814P-35L chips but beforehand should i diag more?

but for the game i am out of ideas.

 

[ack]

The combination of those 2 diag bios errors points to neither ram chip being writable. I would check for activity on the WE pin on both of the 2K ram chips. You might just have a cut/damaged trace.

 

[oguz]

Actually i did if we are talking about CXK5814P-35L chips. Both shows high/low activity

 

[ack]

Yes those are the ones.

 

[oguz]

Yes those are the ones.

Any suggestions? Could the chips still be faulty? Should i remove and do logic test with tl866? or piggybacking would work?

 

[ack]

There is definitely something wrong related to those ram chips. I'm a bit suspect its not the chips themselves, as it seems unlikely they would both have the same fault (returning 0x00 after the diag rom wrote 0x55). I would probably do these things

- use logic probe to verify none of the address lines on the chips are floating
- verify none of the legs on the LSPC chip are loose
- try the piggyback and see if it makes any difference (even if its still bad)