MVS 4 slot (MV4F) board repair help

[iTRDC2]

Hi Arcade mates,

I need some help from you to indentify/ troubleshoot a Video ISSUE that I have with a MV4F board.
Here follows a picture of the ISSUE:

So far I only know that the ISSUE is not related with the TOP board.
I ran the tests with the Neo Diag BIOS but it did not found any ISSUE with the boards.

What do you suggest where I should start to look at?

Thanks in advance,
iTRDC2

 

[iTRDC2]

There is no one to help me please?

Thanks in advance.
iTRDC2

 

[XianXi]

Check for bent pins or solder bridges on the GPU which is the LSPC.

 

[maki]

Can you show more pictures?
Are those glitches moving around the screen?
Are all slots affected?
You get graphic glitches in the crosshatch screen as well, without the top board?
There is a few different 4 slots around, it might help to know which one this is.

 

[iTRDC2]

Check for bent pins or solder bridges on the GPU which is the LSPC.

Hello XianXi,

Thanks for the tip. I took a look at LSPC2-A2 for bent pins or solder bridges but did not find any.
Any other suggestion?

Thanks in advance.
iTRDC2

 

[iTRDC2]

Can you show more pictures?
Are those glitches moving around the screen?
Are all slots affected?
You get graphic glitches in the crosshatch screen as well, without the top board?
There is a few different 4 slots around, it might help to know which one this is.

Please see the answer for your questions.

Are those glitches moving around the screen?
[iTRDC2] No
Are all slots affected?
[iTRDC2] Yes all slots are affected.
You get graphic glitches in the crosshatch screen as well, without the top board?
[iTRDC2] In the crosshatch screen I don't have graphics glitches.
There is a few different 4 slots around, it might help to know which one this is.
[iTRDC2] The MV4 version is MV4F.

Thanks in advance.
iTRDC2

 

[iTRDC2]

Hi,
Any other suggestion on how I can continue the troubleshooting?

Thanks in advance.
iTRDC2

 

[channelmaniac]

If it was the MV4 I'd say replace the PRO-C0 chip. Not sure which one has the functionality of it on the 4F...