Hello. I've done one successful modchip install on a PSone already, as seen in my blog on this site (https://gbatemp.net/blogs/psone-adventures.19365/), and a while ago I got another PS1, model SCPH-1002 PAL version, to install a modchip for a friend, but this time I ran into some issues...
I'll try to not make this post too long, but basically, the PS1 still turns on normally, spins up and reads the disc, but just shows either the BIOS menu or an "Insert Disc" screen immediately afterwards. I'm trying to boot original legit Japanese-region games. I unfortunately don't have any original legit PAL games on hand to test.
Whenever the disc cover is open (the switch isn't closed), the laser starts really acting up, constantly jumping up and down in a seemingly random matter, to the point that it makes some audible clicking noises by doing that. The laser itself also does seem to repeatedly switch on and off while that is happening (definitely shouldn't happen with the disc cover open!). However, as soon as the disc drive cover switch is closed, whether there's a disc inserted or not, the weird laser behavior immediately stops and the drive starts working as if nothing ever happened, reading a disc if there is one inserted. An audio CD reads and plays normally, so I think the possibility of disc read issues can be ruled out. As far as I know, my friend also replaced the laser at some point.
The modchip is a multimode3.0 chip, bought from a local seller. I bought the OneChip for my PSone from them too, and they say that they test every chip on a test console before shipping it, so I don't think there should be any issues with that.
I've tried:
- reflowing all the modchip connections and making sure they are soldered accordingly with the schematics
- checking voltages on the chip's pins with a multimeter - the voltages are there and are variable on some pins
- inserting a burned tonyhax boot disc that works on my PSone
all without results.
I know I might be at a dead end here, but maybe this weird laser behavior can suggest what the issue is? Either way, I'd appreciate any help, since I've done everything I've thought of by myself and I've basically given up at this point.
@KleinesSinchen - maybe you'll know something about this.
I'll try to not make this post too long, but basically, the PS1 still turns on normally, spins up and reads the disc, but just shows either the BIOS menu or an "Insert Disc" screen immediately afterwards. I'm trying to boot original legit Japanese-region games. I unfortunately don't have any original legit PAL games on hand to test.
Whenever the disc cover is open (the switch isn't closed), the laser starts really acting up, constantly jumping up and down in a seemingly random matter, to the point that it makes some audible clicking noises by doing that. The laser itself also does seem to repeatedly switch on and off while that is happening (definitely shouldn't happen with the disc cover open!). However, as soon as the disc drive cover switch is closed, whether there's a disc inserted or not, the weird laser behavior immediately stops and the drive starts working as if nothing ever happened, reading a disc if there is one inserted. An audio CD reads and plays normally, so I think the possibility of disc read issues can be ruled out. As far as I know, my friend also replaced the laser at some point.
The modchip is a multimode3.0 chip, bought from a local seller. I bought the OneChip for my PSone from them too, and they say that they test every chip on a test console before shipping it, so I don't think there should be any issues with that.
I've tried:
- reflowing all the modchip connections and making sure they are soldered accordingly with the schematics
- checking voltages on the chip's pins with a multimeter - the voltages are there and are variable on some pins
- inserting a burned tonyhax boot disc that works on my PSone
all without results.
I know I might be at a dead end here, but maybe this weird laser behavior can suggest what the issue is? Either way, I'd appreciate any help, since I've done everything I've thought of by myself and I've basically given up at this point.
@KleinesSinchen - maybe you'll know something about this.
