v4 inside a v7 check it out

[Headly]

I just received a PS2 from a guy my brother works with. He had on before and some magic chips he had ordered(turned out to be clones) He had another guy try to install on it and he totally f**ked it up. Soldered pins together and cracked one resistor and totally broke another clean off the board. Anyway he purchased a new one from TJ Maxx. I opened the box and checked the numbers, v7 no suprise. However, as i opened it I noticed an extreme amount of dust, like a two year old PS2 that has never been cleaned. I look on the side of the DVD drive and low and behold there is the battery. At this point I am like what the hell. Get it apart and it is a GH-010 MoBo with 030 bios. This would be a v4. My only real consern is I have looked at Charlie's PS2 version identifcation guide on PS2newz and this combo is listed as having Messiah problems. Is there any way a Messiah will work on this console? How could this have happened? I checked the warrenty sticky as I peeled it off and it showed no signs of prior removal.

Here are the numbers on the shell:
SCPH-39001
AU2682716
Date Code: 2D
PT426827168