[PS1] Can't load games after mod chip install.

Hello,This was my initial post.

After ordering and receiving Mayumi v4 from Bad_Ad84 I opened up the system to install the chip. I was expecting a PU-22 board. But it was a PU-18.



So I followed the PU-18 diagram to install the chip. I triple check all the solder point. It was ok.



After checking, I put back the system together. Upon booting a burned or original game, I got this screen.



The system menu is all in english.

Please Advice/Help. Did I got the wrong modchip?

 

Whats the first line of text on the chip directly above where point 7 goes?

Cxxxx

 

It is C 2030

Can this problem be solved?

 

So its had the motherboard swapped. Thats a US motherboard, which is why the chip doesnt work properly

A 7503 should have a US bios, but Jap mechcon (so you need jap modchip)

That mechcon is a USA one, therefore the board has been changed.

 

So what version of Modchip do I need? Could you pm me the details?

Thank you very much.

 

You need a Mayumi v4, but a USA one - not the Jap one you would need if it was actually a 7503 (and what I sent you, because of the model number).

 

Probably better in the long one in that you'll be able to boot PAL and US originals too.

 

Well a proper 7503 would too, as it has the US bios.

 

strange that the mono has been swapped :/

 

It is strange too. I wonder why was the board swapped. Once I receive the correct modchip from Bad_Ad84. I will report back the progress in this thread again.

Thanks alot.

 

I just received Bad_Ad84's Mayumi v4 mod chip (USA version). I replaced the previous chip. After testing all backups and originals, all is working fine! Even Anti-mod chip games like Wild Arms 2 boots fine.

Thanks for all the help Bad_Ad84!

 

Good stuff all round then.