PS2 Help?

[yuexiang]

Hi,

I just got a modded PS2 recently (by way of a friend), so unfortunately I have no idea what chip's inside. I just know it (supposedly) boots directly PS2 discs, and needs a reset and hold power for 2-3 seconds for PSX and DVDs.

Snag is that it boots PS2 discs (HK DVDs, CDs, CD-R backups) perfectly, but when i try the reset and hold boot for PSX (CD-R backup, HK silvers), i hear the sound u usually hear from an actual PSX at a black screen, then the console seems to hang indefinitely there. Also, for DVDs (original cross-region) i get the error message that says that i have the wrong region.

Now obviously there's something screwy when i use the reset and hold boot, i just have no idea what. it probably isnt the chip though, i've seen (although just once, elusively) the console boot up a CD-PSX R backup.

I'm not really in a position to take the console back to the vendor, so i was hoping some of you gurus have some advice for me. I'm not too averse to opening up the console, just as long as i know what i should be looking out for. So somebody, anybody with an idea, please help!

Sorry for the lengthy read and TIA